If you have a Dometic single zone thermostat it needs to be initialized. This will stop the clicking.
System Initialization
A system initialization will need to be performed by the installer after the system is installed.
• Make sure the Single Zone LCD thermostat is in the Off condition. See page 4, “Quick Reference To Control Buttons”.
• Press the “+” button and, while holding it, also press and hold the On/Off Mode button for three seconds. LCD will show - - . Press the On/Off Mode button again to turn system off.
This completes the initialization.
