How Does The Furrion Chill Cube Thermostat Get Wired To The AC System

Question

Question:

I have a Furrion system already do you use that wire harness in the picture or is that for applications? I don’t have Furrion already

asked by: Matt

0

Expert Reply:

Hey Matt,

Furrion typically has 4 wires running to their thermostats and the Chill Cube Thermostat # LC74DX is no exception. The harness you see with the thermostat would plug into the Chill Cube's controller and has 4 wires to extra wire to to run wherever you're installing the thermostat. The wires are color coded and there's a sticker on the harness explaining what each color's function is to make installation easier.

expert reply by: Kevin C

0

Robert D.

4/15/2025

Hello Kevin , I ordered the thermostat #LC74DX for my furrion system , Is the thermostat , controller , and my wiring from my AC all I need to make this installation complete ?? Could you please send me the schematic of the unit and the thermostat / controller ? Thank you

Jason

9/9/2025

@RobertD did they send you the schematic? Can you share with me? I have the same issue.

Bob T.

6/29/2025

What wires do I need to connect the furnace? I have 2 blue wires coming from the furnace that are connected to red and white wires. Do they connect to the to the "gnd" and "furn+" terminals on this thermostat?

Nick S.

7/1/2025

@BobT The white wire is going to be your common ground wire for the "gnd" hookup and the red wire is going to be the furnace return signal "furn+". I attached a manual for that thermostat as well for you to take a look at.

Helpful Links

https://lci-support-doc.s3.amazonaws.com/furrion%20documentation/air%20conditioning/manuals/ccd-0008973.pdf

Trenton

7/7/2025

@NickS that is exactly how I have mine wired but the thermostat will not power up the furnace. When installing I did notice that I have a very low current running through that white wire. When not connected to 120v the thermostat kicks on and of cycling the furnace on its own. As soon as I connect to 120v it no longer does that but then the thermostat want turn of the furnace at all. Maybe I’m missing something simple but at this moment I’m stumped

Nick S.

7/8/2025

@Trenton You said you have the thermostat connected to 120v or 12v? I know the thermostat itself is designed for low voltage like 12-24v so having it on a 120v circuit could be causing that issue.

See All (13) Replies to Bob T. ∨

Deano

8/3/2025

I have same problem where can't get furnace to work. Furrion manual told me to buy thermostat FACC13VSD-AM-KIT (PN 2024047199 in order to get a furnace to work. I had to reverse the wires coming from furnace (white to be +positive and red to be ground per the Furrion description of wire descriptions and that was only way to get furnace to turn on and then after it lit after about 1 min it shut down with thermostat saying LOW. The AC unit had manual blower running low at the same time and in all my RV time i have never had a manual blower run while furnace is running. Very disappointed with Furrion for something so simple as I have changed AC units in past and never had something like this be so complicated to figure out. I guess only choice is to just put a cheap furnace thermostat as Furrion can't figure this out even though the advertise it to be able to connect to a gas furnace. If you are thinking about buying the Furrion I would hold back as they definitely need some fixing to how their systems work. If you are willing to use it in a no make sense mode buy it.

Mark

9/27/2025

@Deano I had the same problem. Check your connections to the thermostat. I had placed them all backwards. Once reversed they worked fine. The drawing in the instructions is reversed from actual looking at the back of the thermostat.

Deano

10/8/2025

@Deano I finally got this to work. I ran a dedicated 12v hot wire to the thermostat where it says positive and for the negative I ran the negative wire from the furnace (not the wire from furnace that always has 12v on it). Now it works like it should beside the manual blower is always running on the a/c unit. Granted it is running very slow but there should be a way to shut that down, especially when running on furnace. I guess Furrion should put me on the help support desk and I can take calls on how to fix their mess.

Jameson C.

10/8/2025

@Deano Thanks for passing on worked! The fan runs all the time to run air over the thermostat sensor to get an accurate reading.

See All (5) Replies to Deano ∨

Josh

4/16/2026

Curious if others are still having issues with this. I just received and installed my new Chill Cube this week. I hooked up the thermostat, and want my furnace to work. I ran 12V positive from my RV's power, and bonded the neutral from the chill cube to the RV's 12V system's Neutral. My furnace does not come on when calling for heat. I did confirm the furnace works by removing the two furnace leads from the rear of the thermostat and touching them together. Heat did come on. Anyone have any other ideas of what I can try to remedy this short of purchasing a separate thermostat? Thanks,

Robin H.

4/16/2026

@Josh I can tell you Furrion doesn't have a good solution right now. We have escalated this about as far up as we can in their company. Even with Furrion on the phone working on it directly at a camper they can't come up with a way to get some setups to work. Until they're able to sort this out, the best solution is to run the furnace off of a separate thermostat like the # DMC84RR.

Josh

4/16/2026

@RobinH I figured it out after reading several posts on forums and an AI search. For the 4 main wires, I have a 12v positive from my battery 12v system (abandon the red wire from the bundle that connects to A/C. Connect green from A/C bundle to the negative from the RV 12V system, connect negative to the ground terminal from camper. Connect the two signal wires to their respective points. For the furnace connection if the above is followed: Check your two wires from your original furnace connection to your previous A/C. One is 12v plus. Abandon this cable. Connect the other wire, which has no voltage (Furnace signal wire) to the furnace terminal. Leave the ground terminal on the furnace side open with no wire. I have an image but am unsure how to attach.

Robin H.

4/17/2026

@Josh I'm glad that worked for you, there are definitely setups where it does not and there are a lot of furnace models out there.

See All (4) Replies to Josh ∨

Answer 1

Please see the attached images for wiring diagram and installation instructions for the Furrion Chill Replacement RV Air Conditioner for Furrion Setup, #FR86PR.

view full answer...

Answer 2

Hey Andrew! Yes, Furrion does have a Chill Cube model with a heat pump. This was actually just released for aftermarket sale. You will need a complete system to make the switch, new R32 units aren't backwards compatible with old R410A systems.…

view full answer...

Answer 3

Hey Neil. The 18,000 Btu Furrion Chill Cube RV Air Conditioner item #LC34DX fits a 14-1/4" x 14-1/4" cutout which is pretty standard on RV's. If you meant to write Dometic instead of domestic then yes it'll fit in your existing…

view full answer...

Answer 4

Hey Victoria, There is not an adapter out there that would simply just plug the 2 together. For the thermostat you would need to re-wire it manually to install. AC units and parts are no longer compatible with different brands which is why there is…

view full answer...

Answer 5

Hey Kyle! That is correct. The Coleman-Mach Mach-C Everest has variable-speed cooling and an inverter-driven compressor. However, the Mach-C Everest uses a traditional wall thermostat instead of a remote control. It also works with both ducted and…

view full answer...

Answer 6

Hey Nolan, so we can help you with a new AC system but we don't have anything that will plug in and let you use your current thermostat or air box due to refrigerant law changes that took place in January of 2025. So what I would recommend is the…

view full answer...

Answer 7

Hey Jon; I was actually just talking to Furrion about heat options for the Chill Cube yesterday (1/21/2025). At this time, the only way to have heat with this unit is through a furnace on a ducted setup. The Furrion Chill Cube RV AC w/ Air…

view full answer...

Answer 8

Hey Annabelle thanks for the information. I have a solution for you. However, we have found out in the last year that the Advent replacement options either don't work at all, are a mess to rewire because the pins don't line up with the…

view full answer...

Answer 9

Hey Andrew! The Thermostat for Furrion Chill Cube Ducted RV Air Conditioners item #LC74DX does not work with the ductless systems. For a ductless Chill Cube like item #FR59TD, you will need to use the Ductless Air Distribution Box for Furrion Chill…

view full answer...

Answer 10

Hello Justin, thanks for reaching out. Yes, the #LC74DX thermostat will be able to control the AC unit as well as your heater. We have been getting this question a lot lately, so this has been confirmed with Furrion. It isn't available quite yet…

view full answer...

Answer 11

Hi Tim! The PowerMax Wireless 50A RV Power Center and Distribution Panel - 60A DC Converter #PM77VR can definitely be mounted on its side. There is nothing inside this that would specifically need it to be mounted vertically, so you are good to go!…

view full answer...

Answer 12

Hey Mark, thanks for reaching out! Attached are 2 photos that Furrion provides in their instructions for the wiring of the Furrion Chill HE RV Air Conditioner System - Mutli Zone #FR67FJ. I believe the wire you're referring to is the…

view full answer...

How Does The Furrion Chill Cube Thermostat Get Wired To The AC System

Product Page this Question was Asked From

Continue Researching