American Standard
Reversing Valve or Control Problem
American Standard heat pump blows cool air in heat mode or warm air in cool mode
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Stuck reversing valve, Faulty reversing valve coil, Incorrect thermostat O/B setting, Broken O/B control wire
How to Fix / Troubleshooting
Safety first: Turn off power to the outdoor unit before inspecting the reversing valve coil.
- Verify thermostat configuration: Ensure the thermostat is set for a heat pump system and the O/B setting matches your American Standard heat pump requirements.
- Inspect O/B wiring: Check that the O/B wire is connected at the thermostat, indoor board, and outdoor unit.
- Check reversing valve coil: Locate the coil on the reversing valve and inspect for damage or loose connections. Replace if burnt or open.
- Professional service: If the valve is stuck internally, a technician may need to replace the reversing valve, which requires refrigerant recovery and brazing.
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Repair Difficulty
Professional Required
5/5
Required Part
Reversing Valve
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