Wiring at transformer looks good no fraying or burnt or discolored wiring. Some of the things that might be happening are: the pressure switch is open, a short in the pressure switch circuit, blockages in the flue or many other reasons. Gas furnace heating output is rated in BTU (British Thermal Unit). No blower running, no heat. After you have confirmed that the furnace is not the problem, you'll want to check the thermostat. High-efficiency (92 percent and higher) condensing gas furnaces are complex. To the second post, does it happen all the. Both of these issues can be solved with a yearly tune up of your heat pump. You did the right thing by running to the Internet to solve your problem. I have a TRANE XL90. How do I rewire my furnace (Lennox) so the fan only runs when its heating? Update: I already know I need to rewire it because no matter what it runs all the time. Thans Larry. Heats up to 2,200 Square Feet • Digital One-Touch Control with Diagnostics • Up to 55,000 BTU Heat Input • 13 Tube Heat Exchange System • Up to 140 lb. Since the furnace ignites when heat is called for, and the burner shuts off when t'stat is satisfied, the t'stat should be ok, look to the shut down circuit in the furnace control board. Yet so many homeowners do not know what to do to reap these benefits. AUTO ensures that the blower will run only when the furnace heats the air. So take that into consideration before you attempt any of these troubleshooting steps. The intention of a multi-stage furnace is to avoid the spikes in heating your house. During winter, it warms and circulates the air. As if the furnace is just recirculating the air in your house without actually heating it. If you furnace filter is clogged, the airflow will be restricted. Why is my furnace running constantly? Posted by TLC - November 24, 2015 - Energy Efficiency, Furnaces, General, Heating. If the draft blower fan on the front of the wood furnace is the one that is running all of the time feeding the fire. I am sure it is a issue with the blower. For instance, a furnace cleaning is a certain price, a thermocouple replacement is a set price, etc. furnace kicks on furnace heats house temp is reached burners turn off blower keeps running, and running, and running Obviously the furnace got the signal to stop running since the thermostat signaled it to turn the burners off. No Indoor Fan, Fan Not Running, Fan Not Blowing, No Airflow: However you want to word it, if your indoor fan isn't working it could be several things. Today 1/9/2012 I called for heat and run the unit for 45 minutes. Normally, this is an electrical issue. Furnace continues to blow cool air after heating home My furnace's motor keeps running after heating the home. If the heat exchanger (highlighted above) gets too hot, the furnace shuts down. If your heat exchanger doesn't get enough air, it can't transfer enough heat. The blower will continue to run until either the system is reset, or the limit switch closes. This means the fan will run but no heat will be. If the blower is running but no heat is coming out, replace the filter. When I turn the heat/cool switch to cool and lower the temperature setting, the tstat display says 'cool on' and both the inside and outside units are running and cold air comes. But it’s not hot air coming out, it’s cold! Well, it’s not COLD cold, it’s just room temperature. Heat & Glo is the innovative leader in technology, design and safety. This afternoon I noticed it was very cold in the house (59 degrees) and I heard the furnace fan running. If the blower fan cycles on and off as before, then the problem is not the wall thermostat. no blower or fire. A tank with very little gas or an issue in the gas line can lead to low gas pressure. The furnace fan runs but it just blows cold air. This one is for the homeowner. Give the furnace a minute or so for the fan and the heat to kick on. The furnace and fan will come on for a while and then shut off. Re: furnace - Duo-Therm: william heindl: 9-16-07 : I have a 1983 camper with a duo therm model 65900 furnace in it. Clean blower assembly. My furnace blower motor will not stop running. In summer, the furnace works with your heat pump or air conditioner to draw in warm air from your house and recirculate the newly cooled air. It definitely makes a difference and I recommend it. If you're starting to notice a lack of performance, get the system checked out right away. If so, the limit switch, a featured safety device, probably turned the burners off. why would the fan keep going?. Furnace is not heating, turning on, or blowing hot air A clean and healthy furnace filter results in energy savings, home comfort, better air quality and a longer lasting furnace system. If the inducer does not run, the vent pipe is plugged, the blower wheel is damaged, the pressure switch is stuck open or any other failure prevents proper vacuum, the IFC will shut down the sequence. Your furnace requires 10. Other faults causing the blower to run with no heat could be an open pressure switch, power cycling to the furnace (most common in Bryant, Carrier, or Payne units), an open rollout switch (these typically are a manual reset switch that require a certified technician to reset after further inspection of the system), and gas valve malfunction. And I too think it should only run for a few seconds after shut off. As if the furnace is just recirculating the air in your house without actually heating it. No matter how you travel to work, whether it’s by bus, car or train, your commute probably ends with a cold walk in the icy wind. Now is the perfect time to schedule an appointment to have your furnace inspected. Many thermostats are setup so both the furnace and the heat pump kick on when you select a temperature that is more than 5 degrees higher than the current temperature. Start with the simple causes before moving to the more complex. If furnace has electric-eye safety, clean safety; if no result, call a professional. Recommended Action Try turning off your thermostat controls for 1 to 3 hours to see if the system resets itself. Cranked the thermostat up and still no heat. The heat exchanger on a furnace is the section that keeps the combustion chamber and the breathing air separate. It automatically shuts off the fire in the furnace if the temperature becomes too high until the furnace has the chance to reach a safe temperature. To determine if the thermostat is defective, use a multi-meter to test it for continuity. This is why it is very important to keep those filters. Furnace blower stopped. If the high limit switch goes bad, the furnace won’t shut down and the heat exchanger will crack. This interns warms the furnace bonnet or heat exchanger; then, the blower blows the heat through your duct work. phantom furnace blower started up again last night. So your furnace is always running since it can’t heat your home to the thermostat temperature setting. I disconnecting wiring at thermostat but blower continued to run. A high limit control switch will turn off the gas to a furnace if the temperature becomes too high. Our furnace comes on but it blows cold air for a few seconds then shuts off. Why is the furnace blower motor running but no heat is coming out? 1. Ceramic Systems. Or the gas line isn't supplying enough gas to your furnace. Examine the heat registers to see if they are blocked or closed. The trouble codes were 33 which becomes 13 after a period of time. If you have cool air but a steady airflow, your blower motor is working but your heat exchanger or burner is not. System not cooling enough: Check the filter for buildup. I had to use my emergency switch on the wall to turn off the furnace. Supported by the Performance Edge® thermostat and a variable-speed blower motor, this furnace will run in low stage up to 90% of the time. Air from the home's ductwork is blown over the heat exchanger, warming the air. Hi,I have an older Bryant 75000 BTU Natural Gas furnace built in 1986 with a HH84AA 011 board. How Your Fan Normally Works. Box Heaters; Convection. A] RV furnace fan runs but there is not heat. Dirty filters are the most common cause of furnace problems. It happened on three or four occasions and never happened again. Homeowners need to be vigilant in changing their filter up to once a month in the Winter to lower efficiency bills, make sure air quality is pure, and to keep the furnace functioning. If it's just the blower motor then your fan relay is stuck closed. Atwood is now Dometic Atwood Mobile Products was founded in 1909 as the Atwood Vacuum Machine Company by brothers James and Seth Atwood. Undersized Furnace. When the unit is in the cooling mode, the draft is not so undesirable, but. Sail Switch? There is also a 5 amp fuse in there?. After about 10 seconds the furnace fan came on but it only blew out cold air. Keep in mind that the power for blower motor for the furnace is most likely provided from a separate circuit or receptacle. The furnace will overheat and shut down if the blower doesn't come on. If there is no change and the air coming through the vents is warm, contact your local Trane Comfort Specialist™. you have to gaurentee what work you do,so if the motor did reset and started up my fear is it may do the same thing and i am on the hook for. Furnace blower stopped. The revolutionary design of the GW1949 allows it to provide silent heat without the need for any electricity. Check the furnace flame for a complete blue color. The furnace receives the call for heat, the inducer motor turns on, burners light, it runs for a minute, blower turns on, runs for a bit then flames go out, blower runs until the cool down cycle is complete, then it immediately goes right back into the start cycle and does it all again (lights, runs for bit, shuts off, lights, runs for a bit. I chased the thermostat side of things a bit and found: - The blower does not come on when the fan switch is set to on. For example, if the blower motor stopped running then no air would move through the unit. I say "can" be a wonderful source of heat, since most fireplaces are wasteful heating appliances. However, with this switch turned off, the AC and the fan no longer function. The fan limit control is an important safety device. the problem is when I turn on the thermostat you can hear the furnace call for heat but nothing happens. you have to gaurentee what work you do,so if the motor did reset and started up my fear is it may do the same thing and i am on the hook for. If the blower door is ajar the blower door switch will not allow the furnace to run. Fully charge your battery, but disconnect it from the camper when not in use as the propane leak detector is a 24/7 draw. More on The Unico System; Beautiful Installations; Articles; Product Registration; Our Reviews; Contact; Search; Are you a consumer? Are you a trade pro? Contact Unico. Possible problems are insufficient air flow through the furnace a bad propane valve at the furnace or a bad regulator at the propane tank. I say "can" be a wonderful source of heat, since most fireplaces are wasteful heating appliances. It turns on fine when the thermostat tells it to, blows fine and the heat stops once the set temp is reached but the fan keeps running. Homeowners should experiment to see if it works best for their home to have the furnace fan running continuously or not. After a power outage, my Carrier Gas Furnace blower motor will keep running, long after the burner has go out and cold air is coming out of the registers. My furnace blower (fan) that circulates the air runs all the time even if the thermostat is switched to off and auto. Could a bad blower delay cause the fan to run continuously (even. A fan heater, also called a blow heater, is a heater that works by using a fan to pass air over a heat source (e. But if your fan runs constantly, regardless of whether your furnace is heating, that's not normal. the problem is when I turn on the thermostat you can hear the furnace call for heat but nothing happens. Bad Capacitor Causing Motor Not to Start Up. A dirty filter will also cause soot to build up in the heat exchanger, causing your furnace to run inefficiently and reduce it’s life span. Dirty Air Filter – No Excuse. I took the outside cover off to find the blower and motor but i didn't want to go any farther until i asked. I tried running hot water for a few minutes in order to kick the heater on to produce hot water, but it did not go off (generally runs 5 mins or so after using enough hot water to kick the burner). 5 volts DC (battery) in order for the blower to open the sail switch and ignite the burner. I seem to recall there is a wiring option on the motor for it to run constantly but no one has messed with that. Check to make sure the thermostat is set to AUTO, not ON. (72 deg set temp) Make sure you had plenty of gas in at least one tank. This would be mounted on the furnace, and usually under a little box shaped lid. Then that heat builds up and could end up causing your furnace to short cycle. also restarts by turning power switch on furnace off and back on === when cycle is restarted this way it will heat to thermostat setting and shut off except for inducer motor keeps running. A dirty air filter is the most common cause of overheating since it blocks airflow. The furnace operation works like this: Once the thermostat closes, it needs heat from the blower to reach the proper temperature. It's possible that an electrical issue is causing your blower to constantly run, like corroded wires. The burner and pilot all seems to work. This will result in no heat from the furnace or lack of a constant pilot light. Shop online for all your home improvement needs: appliances, bathroom decorating ideas, kitchen remodeling, patio furniture, power tools, bbq grills, carpeting, lumber, concrete, lighting, ceiling fans and more at The Home Depot. A dirty filter will also cause soot to build up in the heat exchanger, causing your furnace to run inefficiently and reduce it's life span. High-efficiency (92 percent and higher) condensing gas furnaces are complex. Mobile Home Furnace Blower Will Not Come On. Check the furnace flame for a complete blue color. This innovative new 10-sensor system analyzes your HVAC and lets you know how your system is performing- helping you stay ahead of problems before they take you and your home out of your comfort zone. After shutting off at the thermostat, the blower keeps running. The blower is not working - clicks when turn it on at the thermostat but does not go on. Common filter problems that restrict airflow include: Dirty air filters ; Installing a filter that is too restrictive (1 and 2-inch pleated filters are common culprits). Fan Runs, But Doesn’t Produce Heat. The reason cold air will continue to blow while the furnace is on and the thermostat is set correctly is because the fan assumes that heat is being generated by the furnace even if the burner is not running. When I turn the heat/cool switch to cool and lower the temperature setting, the tstat display says 'cool on' and both the inside and outside units are running and cold air comes. Usually there's a reason a company is "cheap". The furnace, in turn, would not light the burners in a call to heat. If the furnace does not even try to run, that is if it never even starts, then follow these steps:. Cordless; Natural Gas; Indirect. Some people will be confused by the "blower running after power up" code or something similar. Fast forward. I would shut the breaker off and then it would be okay. However, today, it was hotter than usual. Turn on separate power switch on or near furnace. Dust and dirt restrict airflow—and if the filter gets too clogged, the heat exchanger will overheat and shut off too quickly, and your house won’t warm up. What can I do? Reply: 6 steps to getting heat on when the fan runs but the furnace does not. Dust and dirt restrict airflow—and if the filter gets too clogged, the heat exchanger will overheat and shut off too quickly, and your house won't warm up. So what causes the furnace to overheat? Most commonly, a dirty furnace air filter. Breckwell Big E Utility Furnace and Home Heater. Oil-Furnace Repair and Troubleshooting of service from a properly maintained furnace. The last time we. If the heat exchanger (highlighted above) gets too hot, the furnace shuts down. With that being said the blower in your furnace should run for a short time after the Heat cycle to cool the Heat Exchanger. Furnace blower keeps running? on a carrier weathermaker 8000, with thermostat set at 68, once in a while the blower will keep running blowing cold air long after it should have cycled back off. If the ventor (it's a small motor mounted on the wall of the furnace inside the furnace cabinet) is running, and the safety switches (there are several and all have to work) are doing there jobs, the burners will ignite and keep running until the heat inside the heat exchanger (the thing that makes the furnace work) is justified to start the. If furnace has electric-eye safety, clean safety; if no result, call a professional. A lot of RV's only have the propane furnace for a heat source. I have checked everything and my furnace did run…I may need a new draft enducer…I cleared my humidifier hoses and now my furnace will not come on… I removed hoses from pressure switches before clearing hoses…when my furnace did run I would get a pressure switch stuck open fault and it would shut down after a minute. The blower motor has a relay, delay, and capacitor in its circuit. It is a propane furnace. I've never dealt with an electric furnace so maybe I'm setting the thermostat up wrong but I tried every possible way I could think of. So what causes the furnace to overheat? Most commonly, a dirty furnace air filter. All of a sudden, the blower motor would not stop running though it continues to heat the home. If the blower is running but no heat is coming out, replace the filter. A clogged furnace filter can cause a furnace to shut off. So your furnace is always running since it can’t heat your home to the thermostat temperature setting. Our Armstrong Ultra SX 80 furnace blower won't stop running. First, if your furnace has a pilot light, check to make sure it is lit. Fully charge your battery, but disconnect it from the camper when not in use as the propane leak detector is a 24/7 draw. Oil-Furnace Repair and Troubleshooting of service from a properly maintained furnace. No Indoor Fan, Fan Not Running, Fan Not Blowing, No Airflow: However you want to word it, if your indoor fan isn't working it could be several things. The dirty air filter blocks the airflow, causing the furnace to run longer to heat your home until it overheats. This is a switch, actually two switches, which turns the furnace blower on and off based on the temperature of the heat exchanger. Possible causes: Causes could include a dirty furnace, the wrong nozzle, poor ductwork, a blower motor in need of lubricating, pressure originating from the oil pump or the furnace size not being appropriate for your property. To be sure it is not the thermostate opperate the furnace in the emergancy mode using the button on the ceiling unit. Do the following: 1 Be sure the thermostat is set to the proper setting ("Heat" if you're calling for heat) and the temperature you want the room to be. the furnace runs fine for first heat cycle(2-3 minutes) and then will not ignite producing heat to continue cycle. The blower is not working - clicks when turn it on at the thermostat but does not go on. And I too think it should only run for a few seconds after shut off. Measure the current draw when complete to make sure it's within proper parameters. After you have confirmed that the furnace is not the problem, you'll want to check the thermostat. Another common issue is when the blower begins to blow, but the furnace still isn’t igniting. A heat exchanger is made of thin metal, and as it heats up from the combustion of the furnace, it transfers the heat to the air being distributed through the house by the blower. Probably the first thing that can happen that prevents the furnace from starting is the failure of the draft motor. If the heat exchanger (highlighted above) gets too hot, the furnace shuts down. You said you did but I. Check for blown fuses or tripped circuit breakers at main entrance panel, at separate entrance panel, and on or in furnace; restore circuit. Furnace maintenance should not be overlooked and is imperative to keeping the system running properly. During winter, it warms and circulates the air. Do not allow your furnace to start until this problem has been resolved, or your blower motor will run unnecessarily on high and wear itself down. If it has, turn it to OFF or to Auto. If there is insufficient air flow, the switch will not let the furnace ignite, and the fan runs but there is no heat. If the heating coils are large, then they may require separate circuit breakers. This is preventing a new heat cycle from beginning. Do you mean the furnace blower (fan) won't turn off? Or do you mean the furnace burners won't turn off? We'll tackle these separately. Your furnace then blows natural gas close to the igniter which ignites the natural gas or propane. Humming: Your fan motor is probably going to make a bit of noise, but if it's to the point of disruption, you might need a furnace blower motor replacement. The two key improvements are: 1) reducing the amount of already-heated room air lost up the chimney and 2) directing more heat from the fire out into the room. Check Your Furnace Blower Motor. For instance, a furnace cleaning is a certain price, a thermocouple replacement is a set price, etc. All thermostats let you temporarily make an area warmer or cooler, without erasing the pre-set programming. In normal operation, your furnace blower fan should come on 1. Insulating the water heater tank - Standby heat loss is a problem for water heaters with tanks. Blower clogged. I have a TRANE XL90. T-stat set on off (no heat -no AC) and set to auto not on for ceiling fan. The furnace must have proper airflow through the burner in order to continue running. If the ventor (it's a small motor mounted on the wall of the furnace inside the furnace cabinet) is running, and the safety switches (there are several and all have to work) are doing there jobs, the burners will ignite and keep running until the heat inside the heat exchanger (the thing that makes the furnace work) is justified to start the. However, today, it was hotter than usual. If the outside unit is running but no air is blowing inside, check that the returns aren't blocked, check that the filter is clean, and if that's not it, it's probably the fan or the blower motor (in my case, about a $500 repair) or the control board. That’s because the fan is not working all the time. Power is removed from the Control Board and the Burner shuts down. Families with young children know that heat registers can often get closed mysteriously after a play session. On the left, is a sensor that extends into the burner flame to sense the flame. Usually there's a reason a company is "cheap". This is always helpful to pinpoint the problem to the inducer motor in the first place. Do not attempt to work on the electrical components of your furnace yourself. The furnace blower must run for 30 seconds after it comes on for the burner to fire up. A] RV furnace fan runs but there is not heat. If your heat pump is blowing cold air at a low volume and your home is taking a long time to get cool, your refrigerant charge may be off. I am sure it is a issue with the blower. Now is the perfect time to schedule an appointment to have. Heat & Glo Fireplaces, Stoves and Inserts. You should keep all your vents open, even in the rooms you don't use. Leave the house immediately. Fan Runs, But No Heat. Why Does My Goodman Keep Turning On And Off? Your Goodman furnace will go into lockout mode and try to turn on again if something happens during the inducing process to halt it. This afternoon I noticed it was very cold in the house (59 degrees) and I heard the furnace fan running. Do not attempt to work on the electrical components of your furnace yourself. Burning propane or natural gas generates heat in the furnace's burner. Dirty Filter. I opened the grill in front of the furnace, found the switch and turned it off. Your furnace may be blowing cold air because the filter is too dirty. my question is if you have a furnace blower motor that is exstremely hot and off on thermal and is not resetting because of excess heat would you wait for it to cool and try a capacitor replacement first or relace motor and capacitor. A clogged filter may cause the furnace's blower to run continuously because it can damage the furnace's limit switch. You did the right thing by running to the Internet to solve your problem. I don't see how it follows that just because the thermostat lets you turn on the fan and leave it running. If there is no change and the air coming through the vents is warm, contact your local Trane Comfort Specialist™. A dirty filter or blower squirrel cage causes too much cycling. I put a screw driver in the fan (outside) and pulled it through like a prop start on an airplane, the motor turned on and the furnace ran again for 24 hours. The last thing you want to find is that the furnace is not heating. If the heating coils are large, then they may require separate circuit breakers. In a hot air system, a blower forces air through ducts that open into each room. A lot of RV's only have the propane furnace for a heat source. Even when the blower is not running you are always getting a trickle of heat rising from the vents and that helps maintain a more even and consistent heat! It simply is the best purchase I have ever made in my life! Would I buy one again? All I can say is a resounding, YES!. Blower Won't Stop Furnace Turns On and Off Frequently If the furnace turns on and off frequently, but otherwise works without incident, it's trying to heat the home while working within the constraints that have been set for it. If your furnace seems to be blowing cold air, it could be a problem with the ignition system. Do not touch any electric switch. 3 years ago we experienced an issue where the small fan on the furnace would stay on after heat and not shut off. Your furnace will go off on high limit continuously because it is not getting enough airflow through the heat exchanger. I finally had to unplug the unit to keep it off. Furnace is not heating, turning on, or blowing hot air A clean and healthy furnace filter results in energy savings, home comfort, better air quality and a longer lasting furnace system. The wall thermostat has electrical contacts that control the power supply to the furnace. A furnace not only costs less to install than a heat pump, it is generally cheaper to maintain, and can last 2 – 3 times longer. I have a service contract and the company sent out a man who walked around the. The motor winds down or the thermostat is shut off. In this case, your commercial furnace may be experiencing an issue with the run capacitor or motor, which will keep the blower from turning on after the burners ignite. Technician A has determined that a new thermostat has been installed and the heat anticipator was incorrectly adjusted. Power is removed from the Control Board and the Burner shuts down. The reason cold air will continue to blow while the furnace is on and the thermostat is set correctly is because the fan assumes that heat is being generated by the furnace even if the burner is not running. Problem: The Furnace Is Burning up Far More Fuel Than Usual. Heat/AC experts often recommend running the fan continuously for comfort/uniformity and most of us know the most stress occurs on a motor when it first starts--not in continuous run (and you will be manually kicking it on far fewer times than the furnace would if it was running) Cost for running my fan is negligible. Dust and dirt restrict airflow—and if the filter gets too clogged, the heat exchanger will overheat and shut off too quickly, and your house won't warm up. The dirty air filter will block airflow, causing the furnace to run longer to heat your home until it overheats. I just need to know which wires to switch to make the fan only run when hot air is blowing. Here's a burning question we hear from Lawton, Oklahoma homeowners: "Why won't my furnace shut off?" To answer this, we need to know what you mean by that since it can be interpreted in different ways. So to try to turn the furnace off I switch the thermostat from heat to off and nothing happensthe main fan on the furnace just keeps blowing air and does not stop or power down. The blower motor is running. So what causes the furnace to overheat? Most commonly, a dirty furnace air filter. The limit switch in a furnace or heat pump is designed to shut off the heat pump if the air in the plenum gets too hot. When this process occurs, at times the battery of the RV may run too low to operate the thermostat. It might have a fuse that is blown on the blower part of the furnace. If you are getting 24 volts between C and G and the fan is not running then you might have a control board problem, fan relay problem or a bad fan motor or bad fan motor capacitor. They can heat an enclosed space such as a room faster than a heater without fan, but, like any fan, create audible noise. Blower clogged. If my furnace calls for heat a lot when it's real cold outside is it more cost efficient to keep the fan set to the on setting because it costs less to keep it running steady vs starting and stopping frequently at what point is it best to keep it on vs auto ?. There is no gain of latent heat here, only energy consumption to melt the snow out. Just contact us and we can get your furnace fan running normally in no time. The heater fan turns on for about 30 seconds and then shuts off. I just moved into this house and have not even turned on the heater once! I could not turn it off by fiddeling with the thermostat, so I crawled under the house and found an off-switch. Note: I am not a professional. Warming Up to Furnace Facts. If you have consider replacing your gas furnace and replacing it with a high efficiency rating this may be a great way to save some money and improve your comfort level during the cold weather. If it is humming but no air is coming through the vents, it might be lighting the burner, but without the blower to circulate the heat. Otherwise, the “always on” option will keep the fan running at all times, including when the burner in the furnace is not active. Replacing it is an easy fix. Normally, this is an electrical issue. Some of the. The wall thermostat has electrical contacts that control the power supply to the furnace. But it's not hot air coming out, it's cold! Well, it's not COLD cold, it's just room temperature. Transformer - Your furnace needs a transformer to convert to the correct voltage to run the ignition, controls, and timers. It is a propane furnace. Problem: The Furnace Is Burning up Far More Fuel Than Usual. Another common issue is when the blower begins to blow, but the furnace still isn’t igniting. A furnace blower motor that stops pushing warm air out is not the same as a blower that is forcing only cold air into your home. However the heat registers were closed, if too many are shut, it can cause heat to build up in your furnace, causing it to shut down automatically. Heat passes through the Heat Exchanger, warming the air circulating through the Ducts. How To Know You Need Electric Furnace Repair: MyPros is your authoritative resource for consumer-rated How To Know You Need Electric Furnace Repair, and appliance repair articles and forums. I am sure it is a issue with the blower. If the blower is running but no heat is coming out, replace the filter. By running your furnace blower on continuous air circulation, the heated air in the fireplace room will be distributed throughout your house. If the high limit switch goes bad, the furnace won't shut down and the heat exchanger will crack. This usually solves the problem. The last common reason for a furnace not kicking on is a dirty air filter which is simply an unacceptable malfunction. Soon, though, temperatures will start to rise. Your furnace then blows natural gas close to the igniter which ignites the natural gas or propane. Dirty Filter. Check your thermostat first to ensure it's set properly. My particular furnace model is a Trane XR80. What is currently happening is the gas turns off as soon as the furnace reaches the set temp but the main fan does not stop. The furnace operation works like this: Once the thermostat closes, it needs heat from the blower to reach the proper temperature. Even when the blower is not running you are always getting a trickle of heat rising from the vents and that helps maintain a more even and consistent heat! It simply is the best purchase I have ever made in my life! Would I buy one again? All I can say is a resounding, YES!. From the beginning, every Amana brand product has been made with the same core philosophy: to provide our customers with high-quality products that are reliable, meet their needs, and last longer than the rest. A dirty filter or blower squirrel cage causes too much cycling. It turns on fine when the thermostat tells it to, blows fine and the heat stops once the set temp is reached but the fan keeps running. If the air flow is not sufficient then the switch will prevent the furnace from igniting and the fan will run but you will get no heat. My heater is running, but no heat is coming out, just cold air. The draft inducer motor was obviously bad and I changed it out. I took the outside cover off to find the blower and motor but i didn't want to go any farther until i asked. Construction. I have a TRANE XL90. Basically, the furnace isn't lighting the fuel, meaning it can't heat your home, either. Just contact us and we can get your furnace fan running normally in no time. If the blower is not powered, and there is no air flow through the unit then the heating coils will not heat up. Note: I am not a professional. Make sure that your thermostat is set to HEAT and not COOL, and ensure that the fan is set to AUTO. It's a DC motor and a whole lot more efficient. Furnace motor capacitor looks good. If you are getting 24 volts between C and G and the fan is not running then you might have a control board problem, fan relay problem or a bad fan motor or bad fan motor capacitor. I seem to have no control from the wall thermostat.