RCA Temperature Calibration / Sensor Drift

RCA freezer temperature display does not match actual temperature measured with a thermometer.

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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

Aging cabinet thermistor, Poor sensor placement, Control board calibration error

How to Fix / Troubleshooting

Safety first: Unplug the freezer before accessing sensors or the control board.

Steps to correct reading:

  • 1. Verify with reliable thermometer: Place a quality freezer thermometer in the center of the compartment and allow several hours for stabilization.
  • 2. Compare readings: If the display is off by more than a few degrees, the sensor or control may be inaccurate.
  • 3. Inspect thermistor: Locate and test the cabinet thermistor as described for E1. Replace if resistance does not match expected values.
  • 4. Check sensor placement: Ensure the sensor is not touching the evaporator coil or walls, which can skew readings. It should sense cabinet air temperature.
  • 5. Control board: If a new sensor does not correct the discrepancy, the control board's calibration may be off and require replacement.

Tip: Always rely on an independent thermometer to verify freezer performance.

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Repair Difficulty

Medium 3/5

Required Part

Cabinet Temperature Sensor (Thermistor)
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