Haier
Mullion Heater Operation / Overheating
Freezer interior surfaces feel hot to the touch near the door frame.
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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
Normal anti-condensation heater operation, Mullion heater stuck on high, Control board not cycling heater, Blocked airflow around cabinet
How to Fix / Troubleshooting
Safety first: Mild warmth is normal; excessive heat that can burn skin is not. Unplug the unit if surfaces are dangerously hot.
- Assess temperature: Slight warmth around the door frame is normal to prevent condensation. If it is very hot, proceed.
- Ventilation: Ensure adequate clearance around the freezer for heat dissipation.
- Control settings: Some models allow energy-saving modes that reduce heater operation. Enable such modes if available.
- Technical check: If the mullion heater remains excessively hot, a technician should test the heater circuit and main control PCB. Replace the board if it is continuously powering the heater at full output.
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Repair Difficulty
Medium
3/5
Required Part
Mullion Heater (if equipped)
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