Question about Honeywell TH4210D1005 Heater

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Heat pump auxiliary heat does not turn on

I have a goodman heat pump with a honeywell th4210d thermostat, the auxiliary heat will not turn on when outside temperature is in the low 25-30 degree range,unless there is a setting of 5 or more degree difference between room temp and temp setting the problem is I cannot maintain a steady room temp. How does thermostat know when to turn on aux. heat? Thanks

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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.

Posted on Nov 30, 2008

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I hope you find this information to be very helpful to you. Please don't forget to leave a rating.

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