H3
Rheem
Compressor Overload / Thermal Protection Trip
Rheem inverter outdoor unit shows H3 and shuts down; compressor may be very hot to the touch.
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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
High head pressure from dirty condenser coil, Overcharge or non-condensables, Failed condenser fan motor, Restricted refrigerant flow (TXV or filter drier issue)
How to Fix / Troubleshooting
Safety first: Turn off power and allow the unit to cool before touching the compressor area.
- Clean outdoor coil: Thoroughly clean the condenser coil fins with water and a coil cleaner approved for aluminum fins.
- Check fan operation: Ensure the outdoor fan runs whenever the compressor is on. Replace the fan motor if it fails to start or is noisy.
- Clear airflow: Maintain at least 24 inches of clearance around the unit. Remove shrubs, fences, or objects blocking airflow.
- Professional evaluation: If H3 persists, a technician should check refrigerant pressures, TXV operation, and compressor amp draw.
Warning: Do not reset or bypass compressor overloads. They protect against permanent damage.
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Repair Difficulty
Professional Required
5/5
Required Part
Rheem Outdoor Fan Motor / Condenser Coil / TXV
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