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Fan setting only works

The fan only setting on my thermostat works but when I switch the setting to auto it will not blow air through the vents.

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Re: Fan setting only works

Bad thermostat or open thermostat wire can cause this condition

Posted on Dec 05, 2008

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Re: Fan setting only works

Air Conditioners have a fan speed relay built in the unit, faster for cold air and slower for warm heated air. It is very possible that your relay is defective

Posted on Oct 20, 2007

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1 Answer

My furnace works on ac and blows on ac but on heat it does not blow but i hear a humming sound coming from the furnace

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At your thermostat ,
Set switch to heat, turn up temp switch.
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1 Answer

No air blows out vents how do i fix?

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Fan is continuously running, even when turned off at the thermostat. vents blowing hot air.

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1 Answer

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1 Answer

Heat won't come on in auto mode; blows cool air in on mde(fan)

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