My Whirlpool (bottom) freezer's evaporator keeps frosting, thus rendering the (top) refrigerator warm.
Actions already taken:
- Replaced Defrost heater (U-shaped, stove coil-like heating element)
- Replaced Defrost thermostat (small "eye" looking thing, with 2 wires, and clips on the start of the cooling coil)
- cleaned the coils at the bottom (outside).
- Magnetic door strips looks fine to me.
The freezer frosts completely after around 9-days. The temperature will get extremely cold (-16C) and humidity will be around 70%, with the evaporator completely frosted.
What other things should I check?
Best Answer
Partial frosting is a common sign of loss of refrigerant pressure, i.e. a leak in your evaporative cooling system. You've already addressed the other likely causes of frosting (great!) but that leaves you with the likelihood that it's a leak (doh!).
Refrigerant chemicals are environmentally toxic and potentially hazardous, so at this point you should either have it professionally serviced or replace it (disposing of the old unit properly).