Quote:
Originally Posted by Battlebasset
My unit is newer and I just had it serviced, and my electric heat coil came on. Heat pumps, at least the ones the builder installs, struggle once temps go below about 40 degrees. And if you set back your thermostat at night (like I do) and it is having to raise the temp vs just maintain, it will have to work even harder.
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You mentioned you set-back the heat. This is why your Aux-Heat came on. The system is trying to get the house back to the target temperature and the heat pump alone is not generating enough heat to make this happen.
Almost every electronic thermostat i know of has settings to manage when the Aux-Heat comes on. Just google aux heat for your specific thermostat to find out where these settings are.
Also remember when the Aux-Heat comes on the coil in you air handler can draw about 40 amps so if it's on a long time expect a large electric bill.
Normally the Carrier HVAC the builder installed should work fine with the weather here in Central Florida. But it is possible the temperature could drop below the point where the Heat Pump being able to heat your home which is why we have Aux-Heat.
I can tell you 100%, many don't worry about heat because it usually doesn't stay cold (around freezing) for several days here in the Villages. If it ever stayed around freezing for several days the house and the ground underneaith would loose it's heat build up and your heat would be going on a lot.