Dometic Single Zone LCD Thermostat – User Guide & Manual
The Dometic Single Zone LCD Thermostat is a compact yet powerful control solution for your RV or mobile cooling and heating system. With its intuitive LCD display and easy-to-use interface, this thermostat provides comfort at the touch of a button.
This guide covers installation basics, operating instructions, troubleshooting tips, and FAQs to help you get the most out of your thermostat.
CCC 2 Thermostat / Control Box — Troubleshooting
Thermostat not turning on
Possible cause:
No 12V DC supply / blown fuse
Solution: Check RV fuse panel and wiring
Error “E1” on display
Possible cause:
Loss of communication with control box
Solution: Inspect cables & reset thermostat
AC not starting
Possible cause:
Low voltage / faulty control relay
Solution: Verify voltage, replace control box if needed
Heater not engaging
Possible cause:
Furnace not connected to system
Solution: Check furnace wiring & setup options
Fan runs continuously
Possible cause:
Fan set to ON instead of AUTO
Solution: Change fan setting to AUTO
Frequently Asked Questions
Why does my AC fan keep running? +
If the fan mode is set to ON, it will run continuously. Switch to AUTO so the fan cycles with the system. +
How do I reset the thermostat? +
Press and hold the Mode and + buttons at the same time until the display resets.
The screen is blank. What should I check? +
Ensure the thermostat has power. Check RV fuses, wiring, and the 12V supply.
Does this thermostat control both heating and cooling? +
Yes, it supports both AC cooling and furnace heating systems when wired correctly.
Join The Conversation
Here you can share your thoughts or experiences about this thermostat. If you have any questions, please make sure to read the manual first. If you can’t find the manual, you can request one using our contact form.