LO
Fisher & Paykel
Temperature Too Low / Thermostat Calibration Error
Display shows LO or a low temperature warning, freezer may be running continuously and interior is very cold (below setpoint).
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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
Faulty temperature sensor reading too warm, control board not cycling compressor off, stuck relay on main control board, incorrect user settings (Super Freeze / Fast Freeze mode)
How to Fix / Troubleshooting
Safety: No immediate electrical hazard, but disconnect power before removing panels.
Steps:
- Check settings: Ensure Super Freeze / Fast Freeze or similar boost modes are turned off. Allow several hours for temperature to stabilize.
- Verify sensor: If LO persists, test the freezer temperature sensor (thermistor) for correct resistance at known temperatures. Replace if out of spec.
- Control board: If the sensor is correct but the compressor never cycles off, the main control board relay may be stuck closed. Replace the main control board.
- Product safety: Extremely low temperatures can damage some stored items (e.g., certain liquids). Adjust settings after repair.
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Repair Difficulty
Medium
3/5
Required Part
Main Control Board
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