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Blower on furnace works in on position only not in auto position?
Wiki User
∙ 12y ago
Check the Thermostat or Thermocouple(little probe-like with usually a copper wire coming from it going to the switch or thermostat). It is probably touching somthing hot and telling the blower that it is warm enough and don't come on or either it just isn't sending a signal to turn on at all.
I know one of ours got covered up with dust and was getting warm and because of the dust was acting like an insulation, the thermocouple was staying warm longer than usual, it wasnt allowing the heater to kick on again.
And in one heater of ours the thermocouple was bent right in the line of where the hot air blows out instaed of the return ar and it would come on and almost kick right back off. The thermocouple should have been where the air return air was so it could tell when the air inside the room was warm then kick the heater off.
Wiki User
∙ 12y ago
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Is it advisable to have the furnace blower fan set to the on position at all times?
No it is not advisable. Put it on AUTO. The furnace will decide when it is practical to turn the fan on. Really. No it is not advisable. Put it on AUTO. The furnace will decide when it is practical to turn the fan on. Really.
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When that happens on a Chrysler Town and Country with auto temperature, the blower motor power module has failed. It is also called a blower motor resistor.
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It should be called the auto HVAC blower motor resistor wire harness. Goes from the auto climate blower motor resistor to the blower motor.
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On the auto temp unit it is called a blower power module.
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What might cause a furnace blower to not work when set on auto?
A common problem is this situation is the thermostat itself, though it also depends on the make and model. A proper 'diagnosis' would be found by a professional, especially if it's been awhile since the unit has been serviced.
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Kanto Auto Works's population is 5,901.
When was Kanto Auto Works created?
Kanto Auto Works was created on 1946-04-25.
Heater works on 4 but does not 123?
9 times out of 10 it is the resistor block for the blower motor. Typically this is an inexpensive and easy fix. Check with your local auto parts store - sure they can offer specifics for your vehicle.
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On an auto temp system the blower motor resistor has failed and needs replaced.
