Bauknecht Defrost System Failure

Thick ice sheet forming on evaporator behind rear panel, airflow reduced, temperature rising

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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

Failed defrost heater, Defective defrost thermostat or sensor, Faulty defrost control on main PCB, Broken wiring in defrost circuit

How to Fix / Troubleshooting

Safety: Unplug the freezer and be cautious of sharp metal fins.

  • Manual defrost first: Remove drawers and rear panel, then allow all ice to melt completely. Use towels to collect water.
  • Test heater and thermostat: With components exposed, test continuity of the defrost heater and thermostat. Replace any open components with Bauknecht-compatible parts.
  • Inspect wiring: Check for broken or burnt wires in the defrost circuit.
  • Control board: If heater and thermostat are good but defrost never occurs, the main PCB defrost control may be faulty and require replacement by a technician.
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Repair Difficulty

Hard 4/5

Required Part

Defrost Heater Assembly
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