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