Walk In Cooler Evaporator Coil Freezing Up

Moisture from the air freezes onto the evaporator coils the cooling coils in the freezer and forms an insulating barrier to heat transfer.

Walk in cooler evaporator coil freezing up.

If you notice ice build up around your evaporator coil your freezer may be experiencing a fan delay relay failure. Improper air flow check to make sure there is nothing blocking the return air vent this is the opening where the air goes across the evaporator coil and returns to the unit. This is something an experienced technician can diagnose and repair. Ice can also develop near your drain if your drain line becomes clogged.

In a properly functioning system the evaporator circulates refrigerant vapor at about 40 degrees the optimum temperature to extract heat from the airflow passing through the. If the thermostat is set below the unit s minimum designed temperature or if your thermostat is simply faulty then excessive evaporator coil icing may occur. One other thing i notice the low side pressure would go down to 25psi at times when the room temp. 5 reasons spot cooler coils freeze up and what to do about it.

Is at 39 degree f. This was a service call on a walk in cooler that was iced up i found multiple problems with the system including a very dirty evaporator coil and a refrige. Clogs cause water to pool and freeze over time. Why an evaporator coil freezes the first concept to understand while troubleshooting a frozen evaporator coil is that the coil is supposed to be cold but not freezing.

Airflow also decreases as the passages narrow due to ice buildup. It is also a big energy user but is rarely even thought of until an issue happens. Your evaporator coil could also just be dirty. The evaporator coil is the part of your cooler that is responsible for actually removing the heat from the unit.

Next check for a clean coil and clear drain line. Walk in cooler and freezer problems like compressor failure and failure to maintain pressure can result in costly loss of products inside the cooler. If airflow is blocked you ll end up with a frozen coil. If the walk in cooler is freezing up the first step is to melt ice off the evaporator and then check that the evaporation fan is running and rotating correctly.

Also check all gauges to be sure temperatures subcooling superheat and pressures are all normal.