My 2 roof top A/C units were replaced in November 2014 w/ new Dometic 15K units and also installed was an upgraded new thermostat. The rear unit will not come on. I checked the thermostat for inside t...
I assume you have the NEW 12 button wall tstat. The REAR AC has a separate temp sensor. So, IF the Temp is 57 degrees when you push the INSIDE temp button for Zone 2, It is probably NOT the tstat. The sensor for Zone 2 is the problem. WHAT is the actual temp in the Motorhome? Doug