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Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 6022
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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I have a T1800.. reason, when I t the mode to bring in the

Customer Question

I have a T1800..for some reason, when I hit the mode to bring in the heat, it turns on Heat and then within 10 seconds, it goes to the Auxiliary Heat mode...have never seen that and more so, it won't go above 63 degrees in here and I do not know how to get rid of the Aux Heat!
Submitted: 1 year ago.
Category: HVAC
Expert:  airheatman replied 1 year ago.

Are you raisng temp more than 3 degrees above room temp and does outdoor unit come on?

Customer: replied 1 year ago.
i was raising more than 3 degrees and yes the unit (in attic, not outdoors) comes on but cool air comes out, no heat..
Expert:  airheatman replied 1 year ago.

O has thermostat setup been messed with or is this a new thermostat installation?

Expert:  airheatman replied 1 year ago.

Also tell me model on the outdoor unit.

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