Walk In Freezer 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 freezer evaporator coil freezing up. If you notice ice build up around your evaporator coil your freezer may be experiencing a fan delay relay failure. Each evaporator has a defrost cycle to melt frost ice that has built up on the evaporator coils. Evaporator coil cleaning is an essential part of our ac tune up service for this exact reason. 5 reasons spot cooler coils freeze up and what to do about it.

Over time your system s evaporator coil will become covered in dust dirt grime and more. One other thing i notice the low side pressure would go down to 25psi at times when the room temp. 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.

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. 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. Next check for a clean coil and clear drain line. If the door gasket is torn or not creating a reliable seal or if the freezer is not shut tightly humid air can leak into the freezer.

Ice can also develop near your drain if your drain line becomes clogged. Is at 39 degree f. When this humid air passes over the cold evaporator coils it condenses and freezes on the coils. If airflow is blocked you ll end up with a frozen coil.

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. This was a service call on an iced up walk in freezer evaporator coil. Clogs cause water to pool and freeze over time. Your evaporator coil could also just be dirty.

The door gasket prevents air from leaking into or out of the freezer. Also check all gauges to be sure temperatures subcooling superheat and pressures are all normal. Airflow also decreases as the passages narrow due to ice buildup.