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.

Walk in cooler evaporator coil freezing up.

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. It is also a big energy user but is rarely even thought of until an issue happens. Also check all gauges to be sure temperatures subcooling superheat and pressures are all normal. One other thing i notice the low side pressure would go down to 25psi at times when the room temp.

Your evaporator coil could also just be dirty. 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. This is something an experienced technician can diagnose and repair. 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.

First it is a walk in chiller using r22 when it ice up it starts from the bottom until it cover the entire coil and the unit is a chiller it does not carry a defrost cycle. 5 reasons spot cooler coils freeze up and what to do about it. 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. Next check for a clean coil and clear drain line.

Moisture from the air freezes onto the evaporator coils the cooling coils in the freezer and forms an insulating barrier to heat transfer. The evaporator coil is the part of your cooler that is responsible for actually removing the heat from the unit. Clogs cause water to pool and freeze over time. Ice can also develop near your drain if your drain line becomes clogged.

Is at 39 degree f. 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 airflow is blocked you ll end up with a frozen coil. The walk in freezer or walk in cooler is a major part of many convenience stores cafeterias and restaurants.

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.