by Anthony B
I have two Carrier Performance Heat Pump systems; a two year old 4 ton heat pump operating the first two floors and a 3.5 ton heat pump operating the 3rd floor. The house temperature for heating mode is set to 68 F (maximum).
My problem is that when the auxiliary heat energizes, it usually starts when the outside temperature is 42 F outside. When the temperature drops to 32 – 28 F then both units start running at full auxiliary heat. Each auxiliary heater consumes 130 amps. The result of this is $500-$900 electric bills.
Why on earth is the auxiliary heat coming on at only 42 F? Yes the auxiliary heat ramps up slowly and only stays on in burst. But if it gets colder outside then the auxiliary is at full capacity.
Can I set the auxiliary heat so as not to come on until the outside temp s lower than the 42 F?
The auxiliary heat is killing me… Oh.... and the HVAC techs have no answer ether..