New AC thermostat install gone bad

[mnealuf]

So we just bought a new to us 213EXP and first mod was to replace the analog AC thermostat with digital. Wiring colors looked 1 to 1 with old Coleman ( new one Coleman as well) Easy peasy right,,,,,except I am an idiot and forgot to shut power off and new thermostat had no display. Punted so we could use RV for house guests and reinstalled old thermostat and still nothing. Checked with DMM and no power (12v) at blue and red . Checked all fuses in converter but I guess there is a control board that sends power and maybe I got lucky and it has a fuse? Can I access that thru coach interior or is this a get on the roof job? TIA.

[Fr8Train]

Look on the furnace for a reset button. It's usually a PITA to get to.

[Jagiven]

What year is your 213EXP? On the older htt's, the AC and heating system is completely independent. If so, the AC only works by the controls on the AC on the ceiling.

[mnealuf]

It’s a 2010. I realized the red wire up in the roof ac was actually never connected and taped back. So started tracing other wiring and found a inline 2 amp fuse behind the furnace . Replaced that and it worked. I still haven’t installed new thermostat yet, in the process of all this I re-installed the old one to make sure that wasn’t curplrit .