[bnsherndon]

On my last trip up I-5 two of my roof air conditioners failed.  Newell said that they were not serviceable and would therefore need to be replaced.  After careful inspection I determined that the tubing connection to the evaporator cracked at the connection point.  The problem is that the compressor is mounted on shock absorbers and the evaporator is attached to the frame and no motion is allowed for.  The fix is relatively simple but requires a knowledgeable A/C service tech to perform.  Order the shortest flexible line that Grangers offers (I think it is about 8" long), order a service valve (schrader valve) for the low pressure side, cut out a section of the hard copper tubing and install the flexible section between the compressor and the evaporator, install the service valve in the low pressure line.  Recharge the system and you are good to go.

While I was at it, I had the technician make that modification to all 4 A/C units.  Total cost to modify all 4 was under $1000.  New units are around $2000 each plus shipping and installation.