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My fan on my furnace continues to blow even after it is cut off. What could cause this, something in the box is blinking

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This evidently is a newer furnace with a circuit board in it. Count the number of blinks. Somewhere on the blower motor door is a place that will tell you what the blinks mean. Get back with me when you read what the number of blinks means. If you can find the instructions on the door, you can probably find it in the furnace instructions.

Posted on Apr 09, 2011

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The fan normally runs for a few minutes or so after the gas shuts off.

This removes the heat from the furnace and transfers it into the living space instead of just letting it possibly cause overheating of the furnace until it dissipates. If it is a fan that blows outside, that fan also needs to run for a few minutes to clear exhaust gasses from the furnace - to keep them from dissipating into your home.

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This may need the furnace technician to repair.

I can locate the manual for your heater and the parts list but I cannot locate any reset button.

Blowers that run all the time have either a stuck fan relay or depending on age, have either a defective "fan control and limit switch" or a breaker that operates the fan. When the furnace ignites the fan waits until the air get hot before it blows. When the heat goes off, the fan continues to run until the furnace is cool.

You probably can replace the parts yourself but please make sure it runs safely. The making sure is what the furnace tech will do.

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1 Answer

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check out your fan control could be dusty at the back remove it and clean it also check air fiter is clean , or tthe fan conrtol could need replacing

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Your doing well just right. When the call for heat is on the draft motor gets a call from the board to come on. When this happens if no voltage is present at the motor then you ahve abad baord. Replace it.

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