Replacement AC Unit for a Coleman Mach 8

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Question:

Hi, Im looking for a replacement rear rooftop ac unit for my 2019 Nexus Ghost 34 Ds. It has a Coleman mach 8, model 47203B879 on it now. Its 9 1/2 tall and Ive made it so it uses the ceiling ducts. Im looking for easy start and super quiet. What would you recommend for a replacement? Its on a thermostat all by itself. Thanks

asked by: Randy K

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Expert Reply:

Thanks for the information Randy. To replace your Coleman Mach 8, you'll want the Furrion Chill HE Replacement RV Air Conditioner for Coleman Setup item # FR62PV in black or item # FR82PV in white. This includes an adapter wiring kit that enables the AC to work with your existing Coleman setup. It will be a complete plug and play installation. It has a built in start capacitor and the dual motors make it super quiet.

Are you interested in upgrading to a 15,000 btu unit? We also have the Furrion Chill HE Replacement RV Air Conditioner for Coleman Setup item # FR32PV, which has the same plug in adapter.

expert reply by: Jerred H

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Randy S.

8/26/2025

Yes, I would be interested, would it work with the added draw for amperage with the current wiring & breaker?

Jerred H.

8/26/2025

@RandyS Not sure what size breaker or wire you're currently running but you'll need a 20 amp breaker with 12 gauge wire to run the 15,000 btu item # FR32PV.

Randy

8/26/2025

Also I see that it is 13.5 " tall , mine is 9.5" , I'm not sure I want the extra height, since we are already at 13'

Jerred H.

8/26/2025

@Randy You would need to replace the entire system then, not just the rooftop ac unit. All of the newer replacement options for the Coleman Mach 8 have the R32 coolant in them. The individual components are not backwards compatible with anything made prior to 2025.

Randy S.

8/26/2025

I'm not sure what you mean, I am looking to replace the rooftop unit, that is the whole thing to me, what else is there? Is there a lower profile model?

Jerred H.

8/26/2025

@RandyS That's not the whole thing, item # FR62PV is only the rooftop AC unit. Replacing the entire system would mean installing a setup like the Advent Air Low Profile RV Air Conditioner System item # ADV82SR, which includes an AC unit, air box, thermostat, and start capacitor.

Randy S.

8/26/2025

OK, I think I get it, if it fits the hole in the roof, the air box should fit, what about the thermostat, would I have to pull new wires? Is that possible? What about a model like Furrion FR 49AD its lower height is closer to my original height. Thanks for your patience.

Jerred H.

8/26/2025

@RandyS The Furrion Chill HE Low-Profile Replacement RV Roof Air Conditioner Unit item # FR49AD is just the AC unit. In order to install this AC in place of your Coleman Mach 8, you would need the Furrion Chill HE Low-Profile RV AC System w/ Heat Pump item # FR76AD. This comes with a new AC unit, air distribution box, and thermostat. You can use your existing wiring but everything else related to the Coleman Mach 8 you're replacing will need to go.

Randy

8/26/2025

Thanks for the help!

Jerred H.

8/26/2025

@Randy You're welcome!

See All (5) Replies to Randy S. ∨

Answer 1

As you have a Coleman Mach system currently you can use the Furrion Chill AC units from the list below. These will simply replace only the rooftop units and the controls and thermostats you currently have in place with control the new AC's. 13.5K…

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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.…

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Answer 3

Hello Sam; that is a great question! I reached out to Furrion and you will be able to use the Furrion Chill Cube #FR69TD (white) or #FR49TD (black) with your furnace. However, the remote is not capable of operating the furnace at this time. Also, we…

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Answer 4

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 5

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…

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Answer 6

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 7

Hey Melanie. The reason you can't find a replacement for your GE ARC15AACBL2 15,000 btu air conditioner is because they phased them out. In 2025 all RV AC systems had to change over to a new coolant called R32. This was a EPA mandated decision.…

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Answer 8

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 9

Hey Tim welcome back! Your ARH15AACBL2 GE AC unit has the old 410a refrigerant in it so the GE Appliances item #GE64FR you were looking at isn't going to work as a replacement. The EPA mandated R32 refrigerant has been used in all new AC's…

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Answer 10

Hey Kenny, welcome back! The reason for that note is because all of the new systems since 2025 use R32 refrigerant due to EPA regulations. Any 2024 and older systems use R410A and their parts are not compatible with the R32 units. It doesn't mean…

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Answer 11

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…

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Answer 12

Hi Collin, welcome back! The most economical replacement is going to be from Advent Air. You will need a complete system since everything moved to R32 refrigerant. If your upgraded thermostat is R32 compatible, or a smart thermostat that got a…

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Replacement AC Unit for a Coleman Mach 8

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