Original message
| peabody | "Goodman heat pump" , posted Tue 18 Mar 13:59:  
I am confused on the low volt wiring between tstat, furnace, fossil fuel board, and heat pump. The system is not firing the HP. A wiring diagram for this application would be very helpful. Furnace; Goodman model# gks90904cxac heat pump; Goodman model# gsh130301ab Fossil fuel board; model# afe18 tstat; white rogers model# rth7400
blow it up!
[this message was edited by peabody on Tue 18 Mar 14:05] | | Replies:
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| Northern1 | "Re(1):Goodman heat pump" , posted Tue 18 Mar 20:43  
There should be an O or a B terminal on your thermostat this is to energize the 3 way valve in your heat pump which is used for your 1st stage of heating, your second stage (w2) should energize the w or heating circuit in your auxilliary heat. I dont have a schematic or I would be able to help you more, sorry..
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