Dual Alternators for A/C Removal, newbie

joexsmoot wrote:
Bird - Would you mind to point me in the right direction if you have any websites? Any I've found say to replace pretty much everything, or r12 for outrageous prices.

Thanks! I'll start looking some more then i guess.

If only you were closer to NJ. I'd bring it to you!

Google "R12 to R134a conversion" - you'll get a ton of hits. So long as the system hasn't been sitting open for a long period of time you should be able to convert it fairly inexpensively. You need to replace the accumulator/drier since the desiccant in it will have absorbed the oil from the R12 system which is not compatible with the PAG oil in R134a systems. If the compressor is bad, replace that too and add PAG oil. If it's good, drain the oil out of it and replace with PAG oil. Charge the system with R134a and adjust the low-side pressure up a bit (R134a requires a bit higher pressure). You can find step-by-step instructions that are model-specific by searching online. This will be by far your least expensive route if you decide the chassis A/C is the way to go. That being said, my experience has been that dash A/C in motorhomes is marginal at best. There is too much work for it to do. You have a better shot in a Class C since there's less glass and it's easier to close off the cab.

I would spend the money on a generator to power your roof unit. Forget the inverter. To build something that will actually work reliably will cost a lot more money than a small generator.