Bought a R134A conversion kit and with my buddies help we tried to install this last weekend. He had the tools (vaccume pump, gages, etc:). The system did not have much or any charge left in it. He charged this over two years ago with R12 for me so it took that long to lose the charge. We did not drain the oil out but put two cans of the new oil mixed with R134A in. It seemed to be working but it was not very cold. The compressor was engageing so we figured maybe it needed more R134A so we put another can in. The compressor stopped engageing and I found the fuse to the AC relay was blown. We figured we put too much R134A in so we drained some out but the fuse kept blowing? Did we do damage to the compressor? Would draining the whole system out and remove the compressor and drain all of the old oil help at this point or is the compressor junk now?

Thanks for any help...

Volvos4me4ever