Is the display dead? The only problem I have seen cause repeat failures are shorted auxilary water pumps. The fan and compressor are actually powered by other units on command from the AC pushbutton controller and shouldn't cause a repeat if they were shorted.

In most cases MB does a good job of protecting controllers. They current limit large outputs such that even shorting them out won't hurt them. They either continue supplying the signal controlled to the highest output or they shut down.

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