Comfort thermostat

[ALEX0560]

HOW TO UNLOCK ZONE CONTROL ON CONFORT RV TERMOSTAT , I cant switch to zones from 1 to 2 or 3, i tried to reset it doesnt help

[RV Wizard]

Hello Alex and . We are glad to have you join us and we look forward to reading of your adventures and experiences. Good luck, stay safe and keep us posted.
Have you tried pulling the fuse inside the T'stat? do so for about 10 minutes. Also be aware that a bad florescent light fixture (even though light works) can emit dirty DC voltage on the 12 volt system causing t'stat to not perform properly. Try turning of all lights and even unplug coach from shore power to see if charger is the culprit if necessary. Let us know what you find.