thermostat question


Old 05-27-02, 09:10 AM
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thermostat question

put in new heat pump thermostat the fan comes on but compressor doesnt .
any ideals on what i done wrong.
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Old 05-27-02, 02:46 PM
hvac4u's Avatar
Join Date: Aug 2001
Location: NW atlanta
Posts: 3,147
h/p wiring

hope you marked wires before removing old t stat, if not, may be in for problems. GENERALLY speaking, the wires/colors at the tstat are RED to "R" WHITE to "W" GREEN to "G" BLUE to C or COMMON sometimes called L, look at the paperwork with the tstat. YELLOW to "Y" ORANGE to O/B or O this is where it gets complicated. must know if your unit has the reversing valve energized in heat or cool, what brand? this is all VERY GENERAL crossing the wrong wires will cause other damage. i recommend paying for a service call, or even an inspection of your unit, get some needed maintenance, and have a pro do the wiring.

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