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Old 07-01-2013, 11:09 PM   #16
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Furnace turning on and off when 80


I've seen mobile home furnaces with pilot lights do this all the time in the summer when the house gets really warm. The fan control switch is seeing enough heat to turn the blower one is all.

Turn the power off to the furnace until fall. It should be on it's own breaker/fuse.

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Old 07-02-2013, 08:27 AM   #17
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Furnace turning on and off when 80


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Originally Posted by old_squid
I've seen mobile home furnaces with pilot lights do this all the time in the summer when the house gets really warm. The fan control switch is seeing enough heat to turn the blower one is all.

Turn the power off to the furnace until fall. It should be on it's own breaker/fuse.
Still again, does not fix the OP problem.
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Old 07-02-2013, 11:03 AM   #18
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Furnace turning on and off when 80


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It may be a matter of semantics. The term stove can refer to a furnace depending on the area you live in, how old you are or what you were taught. While confusing, he obviously isn't talking about his stove because I don't know any stove that has a blower on it except for a convection oven and that is an entirely different thing.
Maybe I should have said a gas woodstove

The electric blower is triggered by a temperature sensor mounted against the stove and when it senses approx 95 it will send power to the blower.

If the OP attic sees high temperatures, this may be the case and the unit is operating as designed and there is nothing wrong.
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Old 07-02-2013, 11:20 AM   #19
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Furnace turning on and off when 80


They have not been back since, so at this point it is a dead subject.
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Old 07-02-2013, 01:33 PM   #20
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Furnace turning on and off when 80


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Still again, does not fix the OP problem.
True, it doesn't.

In my opinion the "problem" is the furnace's fan switch is seeing enough heat in the attic to bring the blower on. This is not a "problem" with the furnace, the fan switch is doing exactly what it was designed to do.......... cool the heat exchanger down when it senses the need.

Other than suggesting that the OP have a qualified service person check the entire system out, verify that the fan switch has not lost it's accuracy and is in fact operating at the on/off temperatures it is supposed to be, turning the power off to the furnace until such time as the attic is cool enough to not make this happen, there is nothing else to be done that doesn't "redesign" the manufacturer's equipment.

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