Thinking out loud here...but would that keep the compressor from kicking on even for a little bit? I know if it get above temp (ie over heating) it should shut down or would hope. Low coolant in the system keep the compressor from coming on like in a residential unit? Hopefully its simple and a cheap fix for you.
*Currently trailer-less but shopping
07' GMC Envoy w/ P2 controller (current TV)
88' Chevy K5 Blazer (soon-to-be TV)
74' VW Superbeetle (1303)