E5
Pevino
Defrost Heater or Defrost Circuit Fault
Display shows E5 and the unit may not defrost properly, leading to ice buildup and poor cooling.
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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
Open defrost heater element on evaporator, Failed defrost thermostat or thermal fuse, Defective defrost relay on main control board, Loose wiring in defrost circuit
How to Fix / Troubleshooting
Safety: Unplug the unit. The defrost heater and wiring can be live and hot during operation.
- Access evaporator area: Remove interior back panel to expose the evaporator and defrost heater assembly.
- Visual check: Look for burnt spots on the heater, broken glass (if glass-tube style), or melted wiring insulation.
- Continuity test: Disconnect the heater leads and measure continuity with a multimeter. An open circuit indicates a failed heater.
- Check defrost thermostat: If present, test the defrost thermostat or thermal fuse for continuity when cold. Replace if open.
- Inspect wiring harness: Ensure all connectors are tight and free of corrosion between heater, thermostat, and main control board.
- Replace faulty parts: Install a new defrost heater and/or defrost thermostat as required. If heater and thermostat test good, suspect a main control board defrost relay failure.
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Repair Difficulty
Hard
4/5
Required Part
Defrost Heater
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