Caple False Alarm from Sensor or Control

Freezer alarm sounds intermittently even though temperature seems normal

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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

Intermittent cabinet sensor connection, Faulty alarm circuit on PCB, Door switch bouncing (rapidly changing state), Electrical interference on sensor wiring

How to Fix / Troubleshooting

Safety: Unplug before accessing sensors or PCB.

Steps to stop false alarms:

  • 1. Confirm actual temperature: Use a separate thermometer to ensure the freezer is at the correct temperature.
  • 2. Check door switch: Ensure it operates cleanly and is not loose. Replace if intermittent.
  • 3. Inspect sensor wiring: Check the cabinet NTC harness for loose connectors or damaged insulation. Reseat connectors at both ends.
  • 4. PCB replacement: If wiring and sensors are sound but alarms persist, the main PCB may be faulty and require replacement.

Note: Document when alarms occur (after door openings, during defrost, etc.) to help pinpoint the cause.

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Repair Difficulty

Medium 3/5

Required Part

Cabinet NTC Temperature Sensor
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