Some refrigerators include a small defrost drain heater positioned at the base of the evaporator tray, above the drain opening. It prevents meltwater from refreezing in the drain tube before it can exit the system.
Signs It Has Failed
- Water freezing in or around the drain opening
- Ice dam forming at the base of the evaporator
- Water pooling inside the freezer compartment despite a clear drain tube
Estimated Part Price
- Generic: €8–€25
- OEM: €18–€55
Estimated Labour Cost
- 30–60 minutes
- Labour charge: €45–€90
- Total repair estimate: €53–€145
DIY Difficulty
Moderate. Located beneath the evaporator panel — same access as the defrost heater. Check continuity with a multimeter. Often replaced as a set with the main defrost heater.