Hi ! Welcome to IRV2! We're sure glad you joined the gang!
When we had the older 5-button CCC Dometic thermostat I had to turn off all the florescents in order to reset it. Otherwise it would show an error code!
Good luck, happy trails, and God bless!
Joe & Annette
Sometimes I sits and thinks, sometimes I just sits.....
2002 Monaco Windsor 40PBT, 2013 Honda CRV AWD