furnace fan not working on auto

If your cables seem to be in good condition try disconnecting the fan for a few minutes and then slotting it back in. If you have a green wire it would connect that red power to the green activating the fan.

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The one for the ON position is a different speed.

. I currently have an issue with fan not turning on automatically when in Auto Fan mode while in Heater mode. On means on the furnace fan runs continuously unless you shut it off or go back to Auto mode. Fan-only mode also called fan mode does not heat or cool.

That said it does work when I put it into Fan On. If the fan does not start you have a wiring issue circuit breaker trips or motor problem circuit breaker does not trip. He says if he puts the fan from auto to on that it works.

Examine the Cables in Your Furnace. Find it on the wiring diagram glued to the inside of the furnace service panel. Joined Oct 12 2010.

Furnace fan not working on auto. This means theres a problem between the board and the motor or with the motor itself. This procedure can sometimes restart the motor and fix your furnace problems.

My furnace stopped working a few days back. Lets be sure that is the right one. Check the circuit breaker controlling the thermostat to make sure that it is on.

It also works in cooling mode but it wont turn on in. Air conditioner fans not working can be a sign of a. The thermostat is just a fancy switch but your furnace must have the necessary.

The initial thing you can do is check if the power supply got disrupted or if there is an issue with the electric fuse. With fan in auto I hear a soft. If the terminal is not energized then youll have to start moving back through the circuit.

Check whether your furnace is switched ON and producing heat as the fan only runs in AUTO mode during the heating cycles. And not the thermostat since it calls for heat and at that point the fan is under furnace control. Its in heating mode.

If your cables are looking fine try unplugging the fan for a few minutes and then plugging it back in. Perhaps your blower motor has burnt out and you need a new one. The first thing that you should do if your furnace blower isnt turning on is change your thermostat to fan-only mode.

Make sure that the power cord hasnt melted or a fuse hasnt been blown. My hunch but I am not an HVAC pro is that the fan is fine because it works in on. Two of the other three will go to the fan relay control.

You could look in the furnace and locate the blower wire that is on the heat terminal of the board and then find one that is on. If the breaker has tripped turn it back on then switch the thermostat to On If the breaker trips. Is your furnace blower motor not working and there is no air coming out of your vents.

Troubleshooting I found it worked when I switched the fan to on position. Which means the fan does not turn off once the furnace shuts down.

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