This is why I sometimes don't like commercial refrigeration. A Delfield under-storage refrigerated compartment wasn't cooling. After I accessed the evaporator coil, I found even though the liquid line solenoid was getting voltage, it wasn't opening. Then, I saw the expansion valve power cap looked like it was in need of replacement. Then, I saw one of the evaporator fan motors wasn't running. Then, I saw how bad the whole evaporator coil assembly looked. Once I determined I couldn't get the screws out of the back panel to remove the fan guard and the evaporator fan motor because the screws are inaccessible without pulling the whole assembly out, not to mention what a pain in the butt it's going to be to change the power cap and solenoid valve, I gave up for the day.
I called Delfield for some guidance, the engineer confirmed that I would have to recover the refrigerant and remove the whole assembly to get the evaporator fan motor out. What? That's when I decided it was best to replace the whole assembly, including the evaporator fan motors, expansion valve, solenoid valve, evaporator coil, etc. Of course, I'm looking at close to a thousand dollars for the whole assembly.
The problem child
The fun begins
Expansion valve and liquid line solenoid
Evaporator fan motor that can't be removed
Leaks waiting to happen