Partially frozen evap, (Thick ice bottom-1/3)
What are some causes for a partially frozen evaporator (besides low charge) on a walk-in evap, 3 fan Larkin food cooler, full charge 404, was running fine, thermostat set on 38, 5 degree differential.
Got a call on this, haven't been there yet. Customer defrosted, but may call me back.
I know that's not much information, but it's pretty much all I have.
I have done all commercial HVAC, not allot of refrigeration, maybe 20%.
Larkin Walk in cooler freezing up top section only
I started working at a restaurant performing services and the owner asked me to look at their Larkin walk in cooler that was only at 50 degrees. Found large section of inside and outside of coils in walk in frozen up, removed all ice, rooftop unit very low on freon, recharged got temp down to 38 degrees, 3 days later all still ok and coils still clear, 1 week later top section inside and outside frozen up, charge ok but temp down to 50 degrees, is this not defrosting and where could I locate the defroster I cannot find it anywhere. Model # is 2 blade low profile