Recommended AC System to Replace Two Dometic Duo-Therm AC Units Controlled by the Same Thermostat

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Question:

I would like to replace two, 2008, Dometic Duo-Therm rooftop AC units w/heat strips that have one Dometic Comfort center controller. I do NOT require the Heat strips on new units. MN on the 2-AC units: 620515.331 What would you recommend? Thanks in advance

asked by: Todd V

0

Expert Reply:

Hey Todd, thanks for the information! To replace your Dometic 620515.331 13,500 btu Duo-Therm Penguin AC's you'll need to replace the entire system including the air distribution boxes and thermostat. To do this, I recommend the following parts:

Furrion Chill HE RV Air Conditioner System - Multi Zone - 13,500 Btu - R32 item # FR85TD in black or item # FR55TD in white

Furrion Chill HE Replacement RV Roof Air Conditioner Unit - 13,500 Btu - R32 item # FR38TD in black or item # FR26TD

Air Distribution Box for Furrion Chill RV Air Conditioners - R32 item # FR68TD

Multi Zone Controller for Furrion Chill HE RV Air Conditioner Setup - R32 item # FR53TD

There's no way to just replace your AC units and reuse your existing air distribution boxes and thermostat, you'll need to replace all your AC system components. This is due to the EPA changing the regulations on the refrigerant in the AC units at the beginning of 2025. They've been upgraded to R32 and your Dometic Duo-Therm has the now obsolete 410a refrigerant. None of the 410a components are compatible now with the newer systems. You will be able to use the existing wiring to power the AC system and connect the new thermostat if yours has one.

The Furrion parts listed above will provide you with two AC's that can be used in ducted or ductless applications. The multi zone controller item # FR53TD will allow you to use the thermostat included with the Furrion item # FR85TD in black or item # FR55TD in white to control both AC systems.

Are you looking for white or black AC units and do you want to be able to control both your ACs from the same thermostat? I'm just trying to dial in the right system for you. We've got quite a few replacement options and I understand swapping out everything to replace an older AC unit wasn't what you had in mind.

You can add this information, along with any other questions you have, where it says Add Comment.

expert reply by: Jerred H

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FR85TD
(click to enlarge)

Answer 1

Hey GD! The Dometic Penguin II High Capacity RV Air Conditioner w/ Heat Pump #DMC98ZR is the equivalent to the 651816HXX1C0-01 you're referencing. This will work as a replacement as long as you have the CCCII Thermostat for Dometic Multi Zone RV…

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Answer 2

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Answer 3

Yes, you can replace just the rooftop unit in order to minimize costs and retain use of your current thermostat. You'll first want to remove the air distribution box cover and look for the controller. There will be a wire harness that hangs down…

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Answer 4

Your Dometic model number 80611342 came back as a 13,500BTU unit so the only other information we'll need to know is the what style connector your unit has. Dometic units will either come with a 6-pin or 9-pin connector (pictured below). The…

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Answer 5

To replace your Dometic unit you'll first want to remove the cover for your air distribution box and look for the wire harness that hangs down from the rooftop unit and plugs into the controller. This wire harness will have either a 6-pin or…

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Answer 6

Before purchasing anything you'll want to first remove the cover for the air distribution box and look for the controller and the wire harness that hangs down from the rooftop unit and plugs into the controller. It will either have a 6-pin or…

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Answer 7

Yes, you can replace your Dometic rooftop AC unit (condenser unit) with a Furrion one and still be able to use your existing thermostat and wiring. You just may need an adapter #ACCOLKIT to go from the wiring harness on the Furrion unit to the…

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Answer 8

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 9

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

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Answer 10

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 11

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

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Answer 12

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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Recommended AC System to Replace Two Dometic Duo-Therm AC Units Controlled by the Same Thermostat

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