I came home from work last night, turned the heat on and it didn't work as advertised. What could cause this issue? The electric relay in a furnace is responsible for relaying electrical power to the heating elements and the blower motor inside the furnace cabinet. Check the gas valve to ensure it is on and provides the fuel to create the heat. Any connections that are the least bit lose inside the furnace will cause a heat build-up, arcing, and eventually a completely burned off connection. The furnace is old but heats well when working and the AC functions great. Tie the red and white wires together, and switch the power on. While your thermostat may be at fault, only an HVAC technician can diagnose and remedy the issue correctly. If you have not already I would suggest that you read the above post and watch the videos. I hope that the following post might help to show you how a heat pump thermostat is wired. I would suggest to be careful and try to test with a voltmeter to see if the heaters are getting 220 volts like you already have. We offer same-day shipping on most products, so you won’t have to do without the goods you need for long. Please see the picture (compliments from one of our nice customers) below of a burnt heat sequencer. I hope you can easily find and fix the problem. What’s your neutral wire gonna be usually in the unit, Hi Bryson! Which thermostat wires control the furnace fan? I’m sure a lot of people will find your article helpful. Verify the unit has power. He was working then all of a sudden furnace wont kick on with switches set at auto and heat. any help would be appreciated. Without me being there to see and test the sequencer and wires going to the fan motor and coming from your thermostat. My furnace seems to be heating okay it is just the blower will not shut off. A furnace blower fan is one of the main components in a hot air furnace or home heater system. If the new thermostat is set to turn the blower on in the heat mode and it still does not start the blower motor I would suggest turning off the high voltage power to your air handler and trace the wires from your blower motor to see what control, relay or sequencer is used to start the blower motor. If your home is a little older, it is quite possible that the humming sound doesn’t originate … To troubleshoot an electric furnace, start with the obvious and move to the complex components. Steve, My nordyne furnace the blower and heating elements won’t work replaced the thermostat and composter but still want work, Hi Mr. Webb! I am sorry that I can not be of much help. Next, check the circuit breaker for your furnace and other HVAC components and ensure that they are in the “ON” position. The 220-volt fan motor would run off the two hot wires and usually the neutral wire is not involved with wiring the fan motor. View our Privacy Policy here. What ever control that controls the fan motor going off an on could be the problem. Steve, Your email address will not be published. It blows cold air what can I do. Most of the time the fan is controlled by a sequencer. 4. Hi my electric furnace the blower works but! Steve. Time to call in … I'm trying to start it up for the fir... Why is my fireplace blower blowing out cold air instead of hot air? I would suggest that you do a search on “How to troubleshoot an electric furnace” using Google. This is where it gets weird; if I touch the orange wire to the metal on the air handler. So sorry to hear that your heat pump will not work. It is a 6 wire system 1 cool 2 heat (heat strips) . A furnace is an intricate system akin to a human body, and when something’s amiss, it will first give you small clues like a non-functioning thermostat. When I was doing service work many times I would find burnt connections on electric furnaces. I would like to suggest that you make sure that you do not have a thermostat problem by seeing if you are getting 24 volts between the W and C (com) connections when your thermostat is calling for heat. There should be a wiring diagram in your air handler’s control box to show you where the wires go on the sequencers and electric heat strips. problems contact webmaster@doityourself.com. Your furnace blower fan not starting can have a few causes as you see here. Here is a link to a good electric furnace troubleshooting video: https://www.youtube.com/watch?v=v6BVL2qhRQU More than likely you have a burnt wire inside the electric heater control box, a blown fuse or breaker, a faulty sequencer or a bad heater element. Turn the power back on and the heat pump and air handler should work if you have a thermostat problem. G (green) usually controls the fan relay and would attached to the G connection inside the air handler. All information is provided "AS IS." Hopefully the outdoor unit will cycle when the thermostat is satisfied. Condenser will engage with the contacts pushed in manually and I have power to an from breakers in air handler. One of the most common problems with furnace fans is a bad blower relay. After ruling out all of the ‘simple’ problems above, the most likely cause of a furnace not blowing air is a problem with the blower fan itself which, if you remember, is the fan that circulates your house’s air over the heated coils. You might have a thermostat problem if your thermostat is set up to run 24 volts through the green wire to turn the blower on in the heating mode, you could have a sequencer problem if the sequencer times the fan to come on after the sequencer is energized from the white (W) wire on the thermostat. I hope that someone reading this post will give you some help and advice. I have an Intertherm Electric Furnace E2EB-015AH. Here is a good Youtube video on sequencer testing: https://www.youtube.com/watch?v=Q3UXjzDZYek There should be plenty of Youtube videos on electric furnace troubleshooting. Turn the power to the furnace off and disconnect the wires from the thermostat. The first thing to do is check the relay or voltage from the board. that where i feel iam having the problem before i unhhoked old one everything was coming on at sametime but never shut off when i took the old one off it actually fell apart so i know it was bad. Hi Ken! Please click here if you are interested in a fan center. If the capacitor that starts the system is failing, you could get intermittent … Thank You. The access panel may be slip-fit on hooks fastened to the furnace housing with a series of sheet-metal screws. I would recommend that you purchase a Volt Ohm meter tester for some of the troubleshooting procedures listed in this section. When the blower fan doesn’t turn off or the furnace cycles too frequently, check the thermostat settings. Again, make sure your power is off. Our email is. I made myself a tester so I could get portable 24 volts without having the furnace power turned on by using an old fan center connected to a junction box with alligator clips attached to the fan center. If you are looking for an HVAC products supplier that will treat you the way you should be treated, turn to us. Please make sure your electrical power is turned off before trying to repair or inspect any type of electrical appliance. I hope this helps you find and fix the problem. First of all, if the oil burner goes on and off too much, clean or … Steve, Gary I installed the Heagstat H725 heat pump 2 heat 1 cool battery or hardwire 5/1/1 or non programmable thermostat to my heat pump in programmable mode (no C wire) . Start by turning the furnace off, turn your thermostat to “fan only,” and wait a few minutes. Any suggestions for what to check? If you still are not getting electric heat then you should test your sequencers to make sure they are working. But the blower will turn on when switched from auto to on?? heat strips dont heat up, fan blows and have heat. You can remove these fuses and test them with a multimeter or if you do not have a multimeter, install new fuses to make sure they have not gone bad. Steve, I have a brand new Revolv electric furnace in a mobile home. When on, the valve's … If the furnace starts, the problem is either with the thermostat wire or thermostat. Below is the video by Grayfurnaceman on how electric furnaces operate: Thanks Grayfurnaceman! Inspect the inside of the air handler or electric furnace for burnt wires. Steve. I am sorry, but I have never heard of this happening. You should have 24 to 28 volts between these two wires if you do not then you either have a blown low voltage fuse, a loose thermostat wire, or a bad transformer. We have one of the Best in Website Security with a Norton Symantec Secured Website and Shopping Cart! Nothing seems to be helping. The Youtube videos are really good: https://arnoldservice.com/how-to-wire-up-a-heat-pump-thermostat/ If you have any more questions or if you want to send me pictures then it would be best to use our email address: arnoldservice@gmail.com. If the fan does not start, you have a wiring issue (circuit breaker trips) or motor problem (circuit breaker does not trip). If power is getting to the blower motor, but the motor does not run, the motor may be burned out. If the limit control is working, you'll see the dial start to rotate towards the FAN ON temperature; when the plenum temperature reaches the FAN ON temperature (read on the face of the dial) The blower should start. Furnace Blower Fan Wont Turn Off - Hello Richard, I have a problem with my furnace where the indoor blower will turn off. Your email address will not be published. Questions of a Do It Yourself nature should be Please be careful when working with the high voltage to not ground yourself out. It suddenly stopped kicking on. Since you replaced the thermostat and still have the problem with the blower not running in heating mode I would suggest that you make sure the new thermostat is set to turn the blower on with the electric heat. I would like to suggest that you make sure that you are getting 24 to 28 volts AC out of your heat pump’s low voltage transformer by testing with a voltmeter between the C (com) andy R (usually Red) wires. Steve. Really the only low voltage wires that go into the electric heaters would usually be the W white wire for auxiliary heat and maybe the E (on your thermostat if equipped) for emergency heat. Thanks for asking your question. Check Your Furnace Blower Fan. I hope you can easily find and fix the problem. 2. Replace the wire or thermostat to fix the problem. I would think that you either have a thermostat problem or a sequencer, control board problem. Beyond that, I do not have any recommendations. If you are getting 24 volts between R and C then you should be able to bypass the thermostat by turning the power off to the heat pump unit and tieing the Red, Green, Yellow, and Reversing valve wire (The O wire) together. You should have 24 volts through the green wire if this is the way your thermostat is set up. Well I cut all power and double checked the tstat wiring and found nothing to be wrong. Arnold’s Service Company, Inc. is a family-owned, Christian business that always treats customers with consideration and respect. To ensure our content is always up-to-date with current information, best practices, and professional advice, articles are routinely reviewed by industry experts with years of hands-on experience. The blower motor blows air through the return vent, past the heat exchanger, and into the home’s venting. here is the model number of the furnace iam working with feh-015ha-03 intertherm, Hi Jerry! We Provide Fast UPS Shipping! First time working on furnace not much experience with electric. If I have the orange fan wire touching the metal and turn the thermostat down so it is not calling for heat; the heat will turn off but the fan will keep running until I move the orange wire off of the metal. A good electrical tester multimeter would be nice to test your fuses. You would also have one common (C) wire to the heaters to make the circuit complete. You can see where the heat build-up and arcing have caused the terminals to completely burn off the left side! This is another common reason behind faulty blower fans. 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Warm the air, and switch the power on have questions, assistance... Going to electric heat then you know that the blower will turn on the air handler cool 2 heat heat! ) wire to the circuit complete furnace is responsible for relaying electrical power getting. Current ) that is being used by a component to ensure everything is plugged in correctly it ’ service. Dust or loses lubrication, it 's readily apparent motor and coming your.
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