Sorry to say that it won't work. Dometic uses proprietary digital signals from their relay control board to the t/stats. If you were so inclined and equipped, I'm sure you could duplicate the signals and be able to modify them for your use in ant t/stat.
If you are that techie and you succeed........let me know!
RVIA/RVDA Nationally Certified Master Tech
Master Tech Energy Systems, Inc.
AM Solar Certified Installation Center
Lifeline Batteries**Magnum Inverters
Lew Farber...RVIA Certified Master Tech...ABYC Certified Master Marine Electrician
SOLAR TECH ENERGY SYSTEMS, INC.
AM SOLAR ...MAGNUM…VICTRON ENERGY...LITHIUM & LIFELINE BATTERIES…MARINE REFRIGERATION