Domestic A/C,heat control box

[Martin R]

We arrived home yesterday after a long trip and hooked up our 2012 International 30 to our 50amp shore power to prepare for clean up. The A/C (both units ran and brought the temperature to the set 78 degrees. We left the trailer overnight and I noticed by late morning with the outside temperature reaching 85 deg that the A/C had not started. I looked at the domestic control and it is dead and does not respond to any attempts to light up/display. The light which I believe to be on the same circuit as the control box (bedroom/shower lights) all work fine. Any suggestions for further checking?

[A W Warn]

Last year I had a similar issue. One of the 12v breakers had tripped.
I suggest you should check continuity of the 12v fuses/breakers. If they are good, check the 12 power supply wire and ground wire at each roof top unit.