WarningEvaporators & Cases
Evaporator Drain Line Freeze-Up
Condensate can't drain because the drain line or pan freezes, so water backs up, re-freezes on the coil, and overflows or ices the case floor.
Symptoms
- Water or ice pooling in the bottom of a case or walk-in
- Ice building at the drain pan / P-trap rather than (or as well as) the coil
- Drain pan heater or drain-line heater not warm
- Recurring icing that returns right after a manual defrost
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