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Inside fan dont run with thermostat in automatic position

The heating elements come on when thermostat is in auto position.When t-stat is in {on}position inside fan run, heating elements come and is cycled on and off by t-stat.Why want the inside fan run with t-stat in auto position.

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  • geraldbaxter Nov 13, 2008

    I forgot to mension the electronic board mounted on fan housing ,it has two relays mounted on it .when the lever on t-stat is moved from (on)to(auto) both relays click ,only heating elements come on in (auto) .Everything works normal with t-stat in (on) position.

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Some brands use relays and some use sequencers to run the fan in auto

Posted on Nov 13, 2008

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But it is also controlled by the thermostat.

You mentioned that if you remove the thermostat it cuts off. There are 2 switches on most thermostats.
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I believe because it stops when you remove the thermostat that the switch on the fan is set to on possibly. It should be on auto-matic. This way the fan motor only come on with cooling or heating. If in the on it stays on all the time. If this is the case just switch to AUTO.

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Also a whisker of a thermostat wire could be touching inside the thermostat and causeing the motor to run 100%. Look carefully at this and see if it has too long of thermostat wires stickinhg on out under the screws to where they may tough other things.

If neither things stop or show the problem and it deffinately stops when thermostat is removed the thermostat is most likely bad.

If this helps you 1 way to make the repairs your\self or helps you realize you need a technician please rate mne as high as you can.

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