H3
Friedrich
Compressor Overload Protection / Overcurrent
Display shows H3, compressor does not 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
Shorted compressor windings, seized compressor, failed run capacitor (if used), blocked condenser coil, low supply voltage, defective outdoor PCB
How to Fix / Troubleshooting
Safety: Turn OFF power at the breaker. Compressor circuits carry high current.
Steps to address H3:
- Check supply voltage: Verify that line voltage is within the range specified on the Friedrich nameplate. Low voltage can cause high current draw.
- Clean condenser coil and ensure airflow: Remove debris and clean the outdoor coil to reduce compressor load.
- Inspect fan operation: Confirm the condenser fan runs whenever the compressor is commanded on. Replace the fan motor if it fails to start.
- Capacitor check (if applicable): On models with a separate run capacitor, a technician can test and replace a weak or failed capacitor.
- Compressor test: If H3 persists, a technician should check compressor winding resistance and insulation. A shorted or locked compressor will require replacement.
Note: Compressor or refrigerant circuit work must be done by a licensed HVAC professional.
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Repair Difficulty
Professional Required
5/5
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