Can I Replace Dometic 15K BTU AC Unit With Furrion Chill Cube AC?
Updated 02/18/2026 | Published 02/11/2026
Products Featured in This Question
Question:
I currently have a dometic 15K a/c system on my camper. It went out at the end of last summer, I was thinking of upgrading to the furrion chill cube 18K. I know they air distribution box has to be changed, but is there any wiring that needs to be changed, or does the 15k and 18K use the same size wire and circuit breaker. I know you guys used to sell a adapter harness for the thermostat to work, but for some reason I can Find it. Do you still make that?
asked by: Josh
Expert Reply:
Hello Josh, thanks for reaching out. You can replace your 15K BTU Dometic AC unit with a Furrion Chill Cube, but it will mean replacing the rooftop unit, distribution box and thermostat. There is no adapter harness for this. That said, you should not need to change out any of the existing wiring or circuit breakers. The Chill Cube 18K unit draws similar current to other 15–18K units, so you do not have to up-size the wire or breaker if your existing setup is correct and in good condition. So you will just need to choose from the following options based on if your system is ducted or ductless:
- Furrion Chill Cube RV AC w Air Distribution Box, Thermostat - Ducted - 18,000 Btu - White # FR69TD
- Furrion Chill Cube RV Air Conditioner w Air Distribution Box - Ductless - 18,000 Btu - White # FR59TD
What kind of camper do you have? Is it a ducted or ductless system?
(click to enlarge)
T R.
2/17/2026
Josh, I bought a Chill. It will not operate the furnace and A/C both at the thermostat unless Furrion came up with a fix. I had to eliminate the distribution box in the chill and use 2 thermostats. You would think they could create a replacement for the cost. The roof top unit will not supply enough 12v to thermostat to run furnace.
Don S.
2/18/2026
The 18K cube i purchased for my 1 a/c unit, 36ft 5th wheel was beyond my expectation with ease of installation and the massive amount of air it pushed. the old roof top a/c was trashed and condenser plugged with years of black paste. re-building this camper has been a project! the remote provided did all the work for me and i did not use the extra hard wire thermostat with the installation. I hooked in the power wires and pushed the start button on the remote, i did not even hear the unit start, progressively it started and continued to blow so hard dust was blowing out the ductwork throughout the camper vents and was not even on turbo mode! i'm impressed and have a feeling it will work well in the hot AZ summers! those of you with two units, you may want to consider replacing both units!
Jesse M.
2/18/2026
Product Page this Question was Asked From
Furrion Chill Cube RV AC System w/ Air Distribution Box, Thermostat - 18K Btu - Ducted - White - R32
- RV Air Conditioners
- Complete AC System
- Cool Only
- 18000 Btu
- Standard Height
- Single Zone
- Rooftop
- Ducted
- White
- Furrion
more information >
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Josh
2/16/2026
Ducted, but I have a 5th wheel and a 2nd a/c, so what your saying is I will need to replace both units to be able to use the thermostat, correct. I thought there used to be a harness to adapt to the thermostat, or am I thinking of a different company?