Can a Relay Allow a Furrion Chill Cube RV AC Unit to Control a Furnace
Updated 07/13/2026 | Published 04/03/2026
Question:
Hi i just bought and installed a 18k btu Furrion Chill cube, with wall thermostat. i have dominic propane heater. As has been noted the thermostst will not operate the heater. My question is Ive read that people use a relay to get them to work. Do you know what relay they are using
asked by: Joe P
Expert Reply:
Hey Joe, here's what I was able to find on using a relay to allow a Furrion Chill Cube to control a furnace. Basically a 12V DC normally open relay is required to connect the two brown wires from the Chill Cube control module to the furnace’s "call for heat" wires. The relay isolates the 12V furnace circuit from the AC unit's electronics, allowing the Chill Cube's thermostat to trigger the furnace.
A standard 12V DC, SPST (Single Pole, Single Throw) or SPDT (Single Pole, Double Throw) "ice cube" relay (or mini relay) is needed like our # 38659. Connect the two BROWN wires (furnace relay wires) from the Furrion control box to the relay coil terminals. Connect the relay contacts in series with the furnace's trigger wires (usually white, or red/white).
Boyd E.
7/13/2026
Hello, I purchased this relay to connect the furnace to the thermostat. I need to know how to wire it up exactly? Telling me to connect the two brown wires to the 'relay coil terminals' does not help, Which terminals out of the five are they? Then, which terminals are the relay contacts? I know the difference between series and parallel wiring but don't understand it in this case without knowing which terminals are which? Thanks
Product Page this Question was Asked From
Furrion Chill Cube Variable Speed RV AC System w/ ADB & Thermostat - 18K Btu - Ducted - Black - R32
- RV Air Conditioners
- Complete AC System
- Cool Only
- 18000 Btu
- Standard Height
- Single Zone
- Rooftop
- Ducted
- Black
- Furrion
more information >
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on RV Air Conditioners
Mike
4/9/2026
My advice is, why bother? Simply don't hook up the thermostat that came with the Chill Cube and continue using the thermostat you currently have for your furnace. The air conditioner will work separately just fine.