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Old 12-07-2011, 01:57 PM   #1
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My Aux heat keeps coming on 1 thermostat and not the other when it should not be.


My Aux heat keeps coming on 1 thermostat and not the other when it should not be.
I have a 2 stage Heat Pump system (2 zones)(1 heat pump). Both zones are set at an upper temp of 72 deg. One themostat kicks on and off correctly keeping that zone heated to the correct temp. The other kicks on the aux heat and does not stay caught up. If I turn the (bad zone) system off for a few min. and then turn it back on, the heat comes on for a min and two and then turns the aux heat back on. This happens no matter what the temp in that zone (ex. set 72 and actual room temp ranging from 66-70).
I have:
Thermostats = Honeywell Pro TH6220D
Heat Pump = Goodman 5ton R22 (3 months old)
Damper board = Honeywell HZ322 (1 yr old)

Rest of the system is 5 yrs old

Would appreciate any ideas.

Shelby Ball
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Old 12-07-2011, 06:57 PM   #2
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Location: Dayton, ohio
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My Aux heat keeps coming on 1 thermostat and not the other when it should not be.


Sound maybe a damper not opening all the way. You should be able to see the damper motor if its open all the way. But if ou only had it under a year. That company should still offer 1 year non trip or labor warranty
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