Upgrading Coleman Mach 3 RV AC Unit To New System In Camper
Updated 10/11/2026 | Published 10/09/2026
Products Featured in This Question
Question:
I believe I have a Coleman Mach 3. And this Thermostat. I would like to upgrade as this one isnt blowing as cold anymore. Would it work with the new Coleman chill? Or do I need to run new wires?
asked by: Austin W
Expert Reply:
Hey Autstin!
The Coleman-Mach Everest # CM35MR would be a great upgrade from your older Mach 3, with 18,000 BTUs of cooling and a quieter variable-speed compressor!
If your existing Mach 3 uses the newer R32 refrigerant and has compatible controls, you may be able to replace just the rooftop unit with something like the Coleman-Mach Signature Mach 3 # CM97RR. This wouldn't require any other new parts or wiring.
However, if your system is older and uses R410A or R22 refrigerant, you'll need to repalce the complete system with the Coleman-Mach Everest # CM35MR. This includes a new thermostat and ceiling assembly. Your existing 115V power wiring can be reused and rewired to this, but the Everest requires its included thermostat communication cable.
If you meant the Furrion Chill Cube instead of the Coleman, that's another excellent 18,000 BTU variable-speed option. We have complete systems for both:
Ducted Furrion Chill Cube # FR69TD
Non-Ducted Furrion Chill Cube # FR59TD
Could you send me the model number of your existing Mach 3 and thermostat, and let me know whether your RV has ceiling ducts? That'll help me confirm the best replacement!
Product Page this Question was Asked From
Mach-C Everest Variable Speed RV Air Conditioner System - 18K Btu - Ducted/Non-Ducted - R32 - White
- RV Air Conditioners
- Complete AC System
- Cool Only
- 18000 Btu
- Standard Height
- Single Zone
- Rooftop
- Ducted
- Non-Ducted
- White
- Coleman-Mach
more information >
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