Heat pump is not running. Power to heat pump is good. Thermostat says "Heat On" but heat pump compressor is not running. Electric heat running instead. Technician changed the compressor delay to 1 minute rather than 5 today and compressor came on and ran fine. After he left, I set the temp lower and now compressor does not come on, but electic heat is on.
Sounds like a bad board outside.
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SOURCE: honeywell round mercury thermostat - heat not coming on
If you tip the mercury switch so that it makes contact and the furnace
doesn't start, it isn't the t-stat. Check the connections, then
start checking the furnace.
In any case, ditch the mercury t-stat (recycle it properly) and get a
new programmable one if at all posible. It will pay for itself
many times over by turning your heat down in the middle of the night
and back up by morning.
SOURCE: thermostat does not stop heat pump unit
Most of these problems are the program settings on these way overcomplicated thermostats. You will need to re-read the instructions on setting the programs. Or bite the bullet and buy a cheaper and simpler one. If you installed it yourself, make sure the settings on the inside are correct, like gas/electric heat, and 24 volts, stuff like that.
SOURCE: heat pump auxiliary heat does not turn on
Turn up your outside thermostat in the outside unit.
You should have about 3 degrees difference in one stage to the next. So I would change the thermosat with one that has three stages of heat.
SOURCE: Heat pump that just blows cool air
I have a Honeywell heater i'll set my thermostat to 76 and ill turn on the heater and it would turn on... but when it get to 76 it turns off so when the temperature drops down and the heater clicks back on all i get is cold air .. it only works on the 1st time what to do ?
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