[Deper10]

Random other thoughts:

If lack of air is preventing coach access, can you disconnect power from either compressor (assuming you have 12V and 120V comps) and hot wire it to an external power source? IE wire a plug onto the 120V compressor's pigtail and plug it into the wall.
If you have an external air compressor, you could plug into the air inlet in the rear to get air into the system.

Depending on 12V status, you might also need to jump the air solenoid controlling the door. I don't have an air door, so not sure how accessible that solenoid is (also assuming it's a similar solenoid to the rest of the air controlled systems, my ignorance is strong on the air door).

Again, thanks for all your responses but I got it working again. I called Newell and the tech advised me to release the air valve for the door to open, turned the merge switch on, still no 12 volt. I then started the engine, no problem then started the generator and all 12v came on. After letting it run about 15 mins, I turned everything off and with the merge swith on still had 12v. I then turned the 120 shore power on, turned the merge switch off and now everything, including the inverter is working fine. Not sure what I did but again it is all a learning curve. By the way, the tech at Newell said leaving the merge switch on does not hurt anything, even with the solenoid getting hot. That does not sound right to me. Will keep you posted if I have any issues
Thanks
Dario