H3
Keeprite
Compressor Overheat Protection
Keeprite system shows H3 and shuts down; may restart after cooling off.
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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
Low refrigerant charge causing overheating, Dirty condenser coil, Failing condenser fan motor, Non-condensables in refrigerant circuit, Overcharged system
How to Fix / Troubleshooting
Safety first: Turn off power at the disconnect. The compressor and lines may be extremely hot.
- Step 1 – Allow cool-down: Let the unit sit powered off for at least 30 minutes.
- Step 2 – Clean and inspect: Clean the condenser coil and verify unobstructed airflow and proper fan operation.
- Step 3 – Restart and observe: Restore power and run cooling. If H3 reappears quickly, shut the system off to prevent damage.
- Step 4 – Call a technician: A professional must check refrigerant charge, look for restrictions, and verify compressor health.
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Repair Difficulty
Professional Required
5/5
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