Essentials Overcooling – Thermostat or Sensor Out of Calibration

Freezer interior is too cold – excessive frosting on food and walls even at normal setting.

Advertisements

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.

Advertisements

Possible Causes

Faulty cabinet temperature sensor reading too warm, Stuck thermostat relay on main control PCB, Control knob or buttons miscalibrated, Shorted sensor wiring

How to Fix / Troubleshooting

Safety: Unplug the freezer before accessing the control panel or sensors.

Steps to correct overcooling:

  • 1. Verify setpoint: Confirm the temperature setting is not at the coldest position. Adjust to a warmer setting and monitor for 24 hours.
  • 2. Check with a thermometer: Place a freezer thermometer inside to confirm actual temperature. If it is far below the setpoint, suspect control issues.
  • 3. Inspect cabinet sensor: Access the cabinet NTC temperature sensor and check that it is properly mounted to the liner and not touching the evaporator directly.
  • 4. Test sensor: Measure resistance and compare to expected values. Replace the sensor if readings are incorrect.
  • 5. Evaluate control board: If the sensor is good but the compressor runs excessively, the thermostat relay on the main control PCB may be stuck closed. Replace the board if necessary.

Tip: Avoid setting the freezer colder than necessary; this increases energy use and frost buildup.

Advertisements

Repair Difficulty

Medium 3/5

Required Part

Cabinet NTC Temperature Sensor
Check Price on Amazon

We may earn a commission from links on this page.

Advertisements