Edit to post: We have the same problem on our 19 Berkshire 45a XLT. Did you ever get the issued resolved of breakers blowing. Our rear air breaker has blown 4 out of the 5 years that we had it. The bedroom air can run for hours and be fine, but when trying to cool off bedroom at night it will blow. Sometimes it will blow right after another air shuts off. Has anyone found a resolution? The dealer has tried everything. We also are having problems with controlling the AC's. They found a bad comm cable from touch pad screen on wall to the Precision Circuits control board. The modules 1,2 and 3 would randomly go red. I had to unplug the panel from comm cable so it would reset. That is no longer happening but we still lose control of AC's. Temperature drops under where it is set and AC will not shut off. All 3 of them. Or they will switch to heat pump on while still set on cool. Any suggestions? By the way, the comm cable connector connections were bad. Tech tested cable and it had shorts and opens. He cut off both ends and replaced connectors. Then retested comm cable. It is now good. So we are thinking it is the Precision Circuits main board may be bad?