Brandt Thermostat or Thermistor Mis‑sensing

Refrigerator runs constantly and is too cold, food freezing in fresh food compartment

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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

Faulty refrigerator thermistor, Stuck relay on control board, Incorrect temperature setting, Air damper stuck open

How to Fix / Troubleshooting

Safety first: Unplug the refrigerator before accessing sensors or dampers.

Step 1 – Check settings:

  • Verify that the temperature is not set to the coldest level; adjust to a mid‑range setting.

Step 2 – Inspect thermistor and damper:

  • Locate the refrigerator thermistor and test it as described under E1.
  • Find the air damper between freezer and fridge; ensure it is not jammed fully open by ice or debris.

Step 3 – Replace faulty parts:

  • Replace a defective thermistor or damper assembly.
  • If both are good and the compressor never cycles off, the main control board may have a stuck relay and should be replaced.
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Repair Difficulty

Medium 3/5

Required Part

Refrigerator Thermistor
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