Originally Posted by charlespool
Help. I went to check out our 2000 tropical for road ready and see no power going to my 4 button thermostat. There was power and everything working fine last month. Today nothing. Nothing on shore power or generator. Does anyone know of a breaker that may need to be checked? I unplugged and re connected the thermostat and the two telephone type wires to the two air conditioners but that did nothing. I also tried connecting the thermostat to the phone type wire on zone 2 and still nothing.
If you are sure you have 12+volts in the coach, then I would have to advise to do what you already did. Those data cable contacts are known to corrode and lose the connection at the thermostat and at the AC control boards. You might try some contact cleaner on all connections. Open both AC control boxes and check the 3amp fuses, hopefully thats your problem.
If all that checks out, I suspect a mouse got your data cable....happened to me.
Get yourself a phone cord that will reach the thermostat and the Zone 1 control box. Now you will need to remove 1 jack and replace it by rotating 180 degrees. When a standard phone cord is layed flat, both jack clips will be pointing up. With a data cable, one jack must be reversed. If you are not comfortable doing this, radio shack can make you one for a few bucks.
Plug the new cable in between the tstat and Zone1 and reset the tstat. If all is now well, you found the problem.