Goodman Heat Pump: GSH
Re: Outdoor Unit Not Running
The indoor blower is operating, but the outdoor unit fan and compressor are not running.
Qty |
Possible Causes: |
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No Line Voltage Power |
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Bad Capacitor |
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No Call on "Y" |
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Bad Contactor |
|
Open Pressure Switch (LPS) |
CHECKOUT:
1. Check High Voltage Power & Contactor
- Check for 230VAC inlet power across L1 and L2 of the compressor contactor.
- No Power ⇒ Check Disconnect and Breakers
- Check for a "Short-to-Ground" before checking breaker!
- Check to see if the compressor contactor is pulled-in.
- Not Pulled-In → Step 2. Check Low Voltage
- Pulled-In + Inlet Power + Not Running = Bad Contactor or Bad Capacitor
- Check for 230VAC on the leaving side of the contactor.
- Power In + No Power Out = Bad Contactor
- Power Out + Not Running ⇒ Check for a Bad Capacitor
- Motor and Compressor may both be off on over-temperature
2. Check Low Voltage Power
- Ensure the thermostat is calling for either heating or cooling.
- At the control wiring, check for 24VAC between "R" and "C".
- No Power = No power from furnace
- Power Present ⇒ Continue
- At the control wiring, check for 24VAC between "Y" and "C".
- No Power = No Call from the Thermostat ⇒ Recheck Stat
- Look for a Condensate Overflow Switch at the air handler.
- Power Present ⇒ Continue
- Check for 24VAC across the compressor contactor coil.
- Power at Control Wiring + No Power at Contactor = Open Pressure Switch (LPS).
- Check Refrigerant Pressures