I would really like a thermodynamic explanation of that statement:
"Low refrigerant can cause the evaporator core to freeze up after a while".

Since the icing of an evaporator is controlled in most MBs by turning off the compressor electrically when the temp gets too low. It is pretty hard to imagine how any refrigerant or thermodynamic condition would cause icing; especially one that causes reduced cooling. Thats sort of like saying you got frostbite from standing too close to the fire.

I might be willing to believe it but I had real trouble believing the thermodynamics of propane fired refrigerators also. They do work even if I don't believe it. I passed the course but still didn't believe (bg).

__________________
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician