Freezer display shows AL15; unit may not defrost or may over-defrost, causing temperature swings.
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.
Possible Causes
How to Fix / Troubleshooting
Safety first: Unplug the freezer before accessing the evaporator and defrost components. The heater can be hot and wiring is live during operation.
- Access evaporator area: Remove interior rear panel to expose the evaporator and defrost heater assembly.
- Locate high-limit thermostat: This safety device is usually clipped to the evaporator or nearby tubing. Inspect for physical damage.
- Test continuity: With a multimeter, check continuity across the high-limit thermostat and defrost heater. An open high-limit or heater indicates failure.
- Replace failed safety or heater: Install OEM parts only, matching mounting positions and ensuring good thermal contact with the evaporator.
If AL15 returns after replacing these components, the control board may be energizing the heater incorrectly and should be checked by a technician.
Repair Difficulty
Required Part
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