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Heat not blowing on heat cycle

Fan works, air conditioning works. not getting heat on heat cycle

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Have to know what kind of heat it is, Gas, Electric or Electric Heat Pump.

Heat pumps, when air over air type, have an extra setting on the thermostat labeled Emergency Heat, Although these thermostats can work on the other types of heating as well.

Both modern Gas and electric furnaces have the blower controlled by a blower board. The flame and or heating elements can also be controlled by the same or a separate board. SO you could have a board problem, or a safety switch or other symptom causing a safety switch to trip off on you.

Consult with your diagram and find something you can recognize then trace the wires down and follow to where you get the power to turn on the heat (usually always R feeds thermostat and W feeds Heat). Colors of the attached wires means nothing at this point. Look for the terminal designations not colors.

Hope this helps you. Please grade me accordingly and GOOD LUCK. :)

Posted on Mar 03, 2009

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