My 3 way frig quit working on 12v (I accidentally left on two power sources at the same time 12 v and 120 v). Anyone had this problem? Is it repairable? The RV repair center tells me the frig would have to be taken out to access a part. They've never worked on one of these before and at $!30/hour labor that makes me nervous!! There is voltage to the frig from the battery and it gets warm (repair center report), but it won't cool. Gas and 120 work fine.