OP
Kenmore
Open Temperature Sensor Circuit
Display shows OP for a temperature, refrigerator or freezer temperature reading missing or incorrect.
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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
Unplugged or broken thermistor, Broken wire in cabinet harness, Corroded sensor connector, Failed main control board input
How to Fix / Troubleshooting
Safety first: Unplug the refrigerator before testing sensors.
Steps:
- 1. Identify which sensor: OP may appear next to the freezer or refrigerator temperature, indicating which thermistor is open.
- 2. Locate that thermistor: Find the corresponding sensor in the compartment (behind a small cover or on the evaporator).
- 3. Inspect wiring: Look for a disconnected plug or broken wire. Reseat the connector.
- 4. Continuity test: Disconnect the sensor and measure resistance. OL (open) indicates a failed sensor or broken wire.
- 5. Replace sensor: Install a new OEM thermistor if the sensor is open. If the sensor tests good, trace the harness back to the control board to find breaks.
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Repair Difficulty
Medium
3/5
Required Part
NTC Thermistor
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