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.

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Answer 2

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Answer 3

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.…

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Answer 4

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…

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Answer 5

Hi JME; the Furrion Chill Cube Remote only works with the AC unit. It cannot operate a furnace. The ADB #LC64DX works with any duct style. Since this is a ducted setup you will need one of the following systems: -Furrion Chill Cube RV Air Conditioner…

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Answer 6

Hello Mark, thanks for reaching out. I checked with my contact at Lippert and I was told they do not have a reference sheet for the Furrion Chill Cube error codes. They did say that "H3" would be a new error code that they have not seen…

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Answer 7

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…

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Answer 8

Hey Tom, thanks for reaching out. Yes you are on the right track. The Ducted Air Distribution Box #LC64DX (2024040312) will indeed work with the Furrion Variable Speed Chill Cube RV Air Conditioner w/ Heat Pump #FR24TQ (2025008216). They are made…

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Answer 9

Hey Lars, welcome back! I can indeed confirm that the Furrion Variable Speed Chill Cube air conditioner with a heat pump is indeed really happening. They are currently available for order (02/04/26) and will be shipped out towards the middle of next…

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Answer 10

Resetting the #FR33PR requires pulling the power from the thermostat. However, it is unlikely this will fix your error code. The E3 code means there is a loss of communication between the thermostat and control box. Double check your wires and make…

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Answer 11

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Answer 12

Hey Pedro, I checked with our vendors and there is not a direct plug-in replacement for your Dometic Blizzard 15,000 Btu air conditioner. So what that means is to replace your Blizzard you will need to wire in a new unit. I recommend the Advent Air…

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

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