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I am aware of the adjustable differential setting which is basically a dead band that the room temp can swing through.

I guess I am not explaining the situation clear enough.

I am looking for a...

I have visited Honeywell's site several times looking for a thermostat that has an adjustable timing algorithm which will kick in the Aux heat if the heat pump does not reach set point within the...

I have a heat pump with electric Aux.

When outside air temp falls below 35 deg, the compressor almost runs continuously trying to reach set point. The Aux heat wouldn't activate until the room...