Replacement AC System for a Dometic Brisk 99516761

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Question:

Hello I have always 2010 heartland sundance xlt 5th wheel with Dometic ac unit model 99516761, it is a ducted system and ceiling flter cover and vent along with 6 pin connector. Looking to replace it with a new 15000btu system, plug and play. What do you recommend? Thanks

asked by: DOUGLAS W

0

Expert Reply:

Hey Doug welcome back! To replace your Dometic Duo-Therm 57915.331, I recommend the Advent Air RV Air Conditioner System item # ADV92SR in white or item # ADV62SR in black.

There's no way to just replace your AC unit, 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 Brisk 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 Advent Air RV Air Conditioner System item # ADV92SR in white or item # ADV62SR in black are 15,000 btu systems that include an air distribution box that works in both ducted and ductless orientations. These systems also come with a start capacitor that stores up energy. It's going to really help when the compressor kicks on and needs to draw excess power.

Does your current AC system have a 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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ADV62SR
(click to enlarge)

Douglas W.

6/4/2026

Jerred H Yes my system has a thermostat and air distribution bos for ducted system. I don't mind changing everything but I want everything here when I start, if you know what I mean. We are full time rvers stationed in South Texas right now. Doug

Richard D.

6/5/2026

@DouglasW I just ordered one of these at the end of April and received everything all at once. There were two boxes, one had the Air Conditioner and the other box had the air distribution box, the thermostat, and the soft start. Richie

Jerred H.

6/6/2026

@DouglasW I know exactly what you mean! The Advent Air item # ADV92SR in white or item # ADV62SR in black come with everything you need to replace your existing AC unit, thermostat, and ducted air distribution box. These are complete kits. You'll just need to remove your Dometic parts and reuse the existing wiring.

Douglas W.

6/6/2026

@JerredH Thank you very much! Doug

See All (4) Replies to Douglas W. ∨

Answer 1

Thanks for asking Chelsea, I can help complete your setup. I know replacing an A/C can feel like a bigger project than expected, especially when you’re hoping for a simple swap. With the newer units switching to R-32 refrigerant and your current…

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Answer 2

Hey Jerri, the price difference between the two Advent Air part numbers you mentioned is the part #ADV86SR only comes with the upper unit whereas the part #ADV92SR also comes with the lower vent assembly and start capacitor. It's basically a…

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Answer 3

Hey David, it sounds like you know what you're doing but I've also gone ahead and found the wiring diagram for the Replacement Single Zone Thermostat for Dometic RV Air Conditioners #DMC79FR for you to check out so you can use it as a cross…

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Answer 4

The only difference between the Advent Air RV Air Conditioners #ACM150 and #ACDOM150 is that the latter comes with the Start Capacitor for Advent Air RV Air Conditioners #ACMSCKIT. If you wanted to you could buy the Advent Air RV Air Conditioners…

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Answer 5

The model number of your Dometic AC unit itself isn't actually how to determine compatibility, it will actually be the relay kit with the pin. So you will be able to use the Advent Air Replacement RV Air Conditioner for Dometic Setup #ACDOM150B…

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Answer 6

That is correct. The part #ACDOM150 that you referenced is the exact same as the Advent Air Rooftop RV Air Conditioner #ACM150 with the Start Capacitor #ACMSCKIT. This is compatible with Dometic connections that use the 6 pin connector that you see…

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Answer 7

The number that you gave me didn't come back to anything but there is a quick way to tell if the Advent Air Replacement RV Air Conditioner for Dometic Setup w/ Start Capacitor #ACDOM135B is going to be compatible. First, remove the shroud and…

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Answer 8

Hey Eli! The Advent Air RV Air Conditioner System #ADV92SR you ordered is not compatible with a Dometic Duo Therm. However, it really doesn't matter. This is a new R32 refrigerant unit so it won't be backwards compatible with any of the old…

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Answer 9

If you're replacing the controller you would want to replace the entire system. Your system's rooftop unit hasn't been confirmed to work with a different controller and with yours not having a 6 or 9-pin connector you'd have no way of…

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Answer 10

Hey George, you can upgrade your Duo Therm to an Advent Air but you have to go with a new lower unit at same time so instead of the #ADV86SR you'd need the part #ADV92SR which comes with the lower unit as well as a thermostat. At one point we…

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Answer 11

Hello again, Mike. The best way to resolve this is to simply replace your distribution box at the same time as your AC unit. The distribution boxes are not terribly expensive, and that way you would be able to plug the AC right in without any cutting…

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Answer 12

We have a version of the 15k btu Advent Air AC unit that is a compatible replacement for the Dometic Duo Therm units with the part #ACDOM150 which will allow you to use your current Dometic thermostat. It will use same connector too so there…

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Replacement AC System for a Dometic Brisk 99516761

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