Refrigerator leaking water?
A failed defrost heater allows ice to accumulate on the evaporator unchecked; when the ice eventually melts in bulk it overwhelms the drain pan and leaks onto the floor.
Likely causes · most likely first-
Defrost Heater
Moderate DIY Part: $20–$50 -
Evaporator Assembly
Moderate DIY Part: $80–$200An evaporator encased in excessive ice can shed large volumes of meltwater that the drain pan cannot contain, causing water to leak inside or under the unit.
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Electronic Control Board
Moderate DIY Part: $80–$180A faulty control board that skips or shortens defrost cycles leads to ice accumulation that eventually melts and overflows the drain trough.
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Thermistor (Temperature Sensor)
Moderate DIY Part: $15–$40An inaccurate thermistor can cause incorrect defrost cycle timing, allowing partial ice melt that drips outside the intended drain path.
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