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.
Walk in freezer evaporator coil freezing up.
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.
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.
Next check for a clean coil and clear drain line.
One other thing i notice the low side pressure would go down to 25psi at times when the room temp.
Once i got the coil defrosted we found that the cause was the food delivery driver lea.
This is something an experienced technician can diagnose and repair.
Moisture from the air freezes onto the evaporator coils the cooling coils in the freezer and forms an insulating barrier to heat transfer.
Your evaporator coil could also just be dirty.
This was a service call on an iced up walk in freezer evaporator coil.
When this humid air passes over the cold evaporator coils it condenses and freezes on the coils.
The evaporator coil is the part of your cooler that is responsible for actually removing the heat from the unit.
Each evaporator has a defrost cycle to melt frost ice that has built up on the evaporator coils.
Over time your system s evaporator coil will become covered in dust dirt grime and more.
If airflow is blocked you ll end up with a frozen coil.
Ice can also develop near your drain if your drain line becomes clogged.
If you notice ice build up around your evaporator coil your freezer may be experiencing a fan delay relay failure.
Is at 39 degree f.
5 reasons spot cooler coils freeze up and what to do about it.
Evaporator coil cleaning is an essential part of our ac tune up service for this exact reason.
Clogs cause water to pool and freeze over time.
This prevents it from getting the airflow it needs to properly move heat which means that the system could then freeze over.
Also check all gauges to be sure temperatures subcooling superheat and pressures are all normal.
The door gasket prevents air from leaking into or out of the freezer.
