Adding Furrion AC Unit To 2008 Monaco Diplomat With DuoTherm Heat Pump And Furnace

Question

Question:

I have an 08 Monaco Diplomat with two duotherm heat pumps and two LP furnaces and all four operate from a single thermostat and there are two temperature sensors on the walls in the bedroom and living space. I want to replace the living area heat pump with an 18k btu Furion chill cube. The current system is ducted. I’ve attached a photo of the current system and would like to know what I need to make the new Furion system work.

asked by: Robert

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Expert Reply:

Hello Robert, thanks for reaching out. It is possible to add a Furrion Chill Cube RV AC Unit to your 2008 Monaco Diplomat, but there would be no way to have your current thermostat run the AC unit. The Furrion unit would require its own independent thermostat. The Furrion Chill Cube RV AC w/ Air Distribution Box, Thermostat - Ducted - 18,000 Btu - Black/White # FR49TD would be perfect for this since it comes with its own distribution box, controller and thermostat.

expert reply by: Jesse M

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Jesse M.

12/22/2025

Hey Robert, how did things go with adding the Furrion Chill Cube to your Monaco Diplomat? Did the new thermostat setup work smoothly with your existing system? Your update could make it easier for others upgrading their RV cooling.

Robert

12/22/2025

@JesseM it went well. The thickness of our roof required using the four old bolts. The foam to seal the two halves together was short by an inch so we had to purchase some foam to fill in the gap. We use the follow me remote and had to do some wiring to keep our original furnaces and rear heat pump on its original thermostat. We used the unit in Utah in August this summer and it kept the coach nice and cool. Hope to be able to run it on our solar system this coming summer. If they come out with a heat pump unit we will move this one to the rear and put the heat pump in its place. We also like how quiet it is.

Jesse M.

12/23/2025

@Robert Thanks for sharing, Robert! These installs rarely go exactly according to plan, but it sounds like you handled it and got it done which is awesome. I believe Furrion does plan to make a heat strip option for the Chill Cube, but I have not heard of any plans to do an actual heat pump. The heat strip would help take the bite out of the air on chilly mornings, but it would not be a substitute for a heat pump or furnace. If you plan to be camping in cold temps I recommend sticking with a furnace setup. Thanks again for the feedback, and have a great Christmas!

Answer 1

Hi JD; the Furrion Chill Cube #FR49TD air distribution box has a vent on it you can open and close. See the picture attached below. When it is closed it forces more of the air through the ducted system. Assuming you have a ducted system you will need…

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Answer 2

Hey Steven! I do have a compatible replacement for your Coleman-Mach 15 ducted air conditioner. It is the Furrion Chill HE Replacement RV Air Conditioner for Coleman Setup item #FR32PV. It includes a plug in adapter that will allow you to retain your…

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Answer 3

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…

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Answer 4

Hey Tim yes, the Furrion Chill Cube RV AC w/ Air Distribution Box, Thermostat #FR49TD will work as a replacement for your current 15k Btu AC. You will have to swap everything else out though because this unit is only compatible with Chill Cube…

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Answer 5

Hello Derek, Great question! Yes, you will be able to hook up your current furnace to the Furrion Chill Cube. I got to go down for the unveiling of the new AC unit when our video team was shooting the one shot. My favorite feature has to be the…

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Answer 6

Hey Les, thanks for reaching out. So, the 18,000 BTU Furrion Chill Cube AC Unit #LC94DX can replace your Coleman Mach AC unit, but you will need to replace your controller, distribution box and thermostat as well. According to Furrion, the Chill Cube…

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Answer 7

Hey Kevin, yes the Furrion Chill Cube part #FR69TD that you referenced will work great as a replacement for your Dometic and will allow you to control your Suburban furnace with the included thermostat.

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Answer 8

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…

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Answer 9

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…

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Answer 10

Hello Mike, thanks for reaching out. It sounds like you have duo-therm (Dometic) AC system since your thermostat says duo-therm. Our best option for replacing this is a Furrion AC unit either #FR42PV for 15K BTU or #FR82PV for 13.5K BTU. These units…

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Answer 11

Hey Bob! The Chill Cubes like item #LC22BX do not have a heat pump. This may change upon their release but as of 11/18/2024 the answer to that question is going to be no. There's a couple of different options of the Chill Cube as far as ducted…

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Answer 12

Hey Dillon, I REALLY like the Furrion Chill Cube RV AC units like the part #FR49TD. The feedback we gotten these is that they are really efficient, super quiet, and they have a smarter thermostat design where the sensor is on the controller and not…

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Adding Furrion AC Unit To 2008 Monaco Diplomat With DuoTherm Heat Pump And Furnace

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