FZ OP
Frigidaire Professional
Freezer Thermistor Open Circuit
Freezer temperature display shows OP or dashes; freezer temperature not controlled correctly.
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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
Disconnected freezer thermistor, Broken thermistor lead, Damaged connector at main control, Failed thermistor
How to Fix / Troubleshooting
Safety First: Disconnect power before accessing the freezer rear panel.
- 1. Access freezer thermistor: Remove the freezer rear interior panel to expose the evaporator and thermistor (usually clipped to tubing or wall).
- 2. Inspect connection: Ensure the thermistor is firmly plugged into its harness. Look for broken or corroded wires.
- 3. Replace thermistor: If wiring is intact but the error persists, replace the freezer thermistor with the correct Frigidaire Professional part.
- 4. Verify at main board: Confirm the thermistor harness is fully seated at the main control board.
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Repair Difficulty
Medium
3/5
Required Part
Freezer Thermistor
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