Original message
| md75eggharbor
 |  "inside coil compatibility"
, posted Mon 26 Dec 11:15  
I have a Tappan air handler/coil in the attic that was previously used with an AC only outside unit. I wanted to hook up a heat pump to it and a local contractor assured me that it would work fine. He did the installation of the new Goodman Heat Pump (3 ton) and wired in a new heat/ac thermostat. The heat pump work ok for air conditioning, but when I switch to heat it does not provide any heated air and there is no warmth on either the liguid line (3/8th) or the suction line (3/4). I am wondering now if the old ac coil in the tappan air handler can also work for heat. Help me please before I have to finish paying the contractor. He has refused to come back out to troubleshoot my problem. I also think he may have wired the new heat pump or thermostat incorrectly.
DeeJay
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Replies:
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| Archangel
| "Re(1):inside coil compatibility" , posted Mon 23 Jan 01:19
Sorry for the late reply, but that guy appears not to know the heat pump system very well. An AC only indoor coil will not work with a heat pump condensing unit without making modifications.
What you need is a matched heat pump evaporator to go with the new installed heat pump condinsing unit.
Assistant Trades Supervisor HVAC
17 years exp.
Licensed
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