Honeywell
Refrigerant Flow or Reversing Valve Issue (Heat Pump Models)
Unit blows warm air in cooling mode even though compressor appears to run.
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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
Reversing valve stuck in heat position, Blocked capillary or expansion device, Severe refrigerant loss, Internal compressor failure
How to Fix / Troubleshooting
Safety: Refrigerant system service must be done by certified technicians.
Steps:
- Confirm mode: Ensure the unit is actually set to COOL, not FAN or HEAT.
- Check airflow and exhaust: Verify that hot exhaust air is being discharged outside and not recirculated into the room.
- Observe lines: After several minutes of operation, the larger suction line should be cool and sweating; the smaller discharge line should be warm. If both are similar temperature, there may be a refrigerant or valve issue.
- Professional diagnosis: A technician can test the reversing valve coil (if present), check pressures, and determine if the valve, compressor, or charge is at fault.
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Repair Difficulty
Professional Required
5/5
Required Part
Reversing Valve (Heat Pump Models)
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