Troubleshooting Advent Air RV AC Unit that Isn't Working with Dometic Thermostat

Question

Question:

Installed the unit, works great , with exception that it does not shut off when the thermostat signals the temperature is reached. Any thoughts or suggestions. 2015 Winnebago minnie 2201DS Dometic thermostat. Is there something I missed i? Do I need to rest the thermostat?

asked by: Derek W

0

Expert Reply:

Did you use the Dometic lower vent assembly with just the top Advent? Unfortunately this type of issue is very common when mixing and matching between AC components and there isn't a great solution aside from just replacing components so that it all matches the same brand. Otherwise the issues get really hard to address and pin down.

Best option would be a new lower vent assembly and wall control part # ACRG15.

expert reply by: Jameson C

0

Derek

5/1/2025

Yes, exactly.... That's why I purchased the unit, your video made it seem simple....just swap the upper unit and plug in the 6pin connector. Guess not

Jameson C.

5/1/2025

@Derek We recently tried to take all of the info down that said that adapter would work but if there's still a video up that has that could you send it to me so that I could have it take down?

Answer 1

Hey Mike! The Advent Air RV Air Conditioner #ADV74QR is only designed to work with an R32 setup. Your old unit is going to be R410A, so the old components won't be compatible. Since everything moved to R32 last year due to EPA regulations a…

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Answer 2

Advent Air Conditioners like part #ACM135 come with a connector that pairs up directly with the standard 6-wire connector. If you have a 9-wire connector then you need the kit #ACRG15 as well. For wiring I'm attaching some photos of diagrams for…

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Answer 3

Hey Rocky, The A and B wires for the thermostat are just both labeled as "Data Communication". The relay (controller) #PXXACRG12RB for the #ACRG15 would have a blue 22AWG wire for A and purple 22AWG wire for B. If you're reusing the…

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Answer 4

The Dometic model B59516 is showing up as a Brisk II 15K BTU unit so the only thing you'll need to check is what style connector your current unit has. If you remove the cover for the air distribution box inside the trailer you should see the…

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Answer 5

The Advent Air #ACM135 and #ACM150 both have drain holes on the bottom of the pan at the front of the unit that will drain water out onto the roof of the trailer. I've attached a picture below to show you where these holes are located.

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Answer 6

The Advent Air Replacement RV Air Conditioner for Dometic Setup #ACDOM135 is a great option to replace your current Duo Therm and will be a simple plug-and-play installation for the wiring via the connector (see attached). This way you're only…

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Answer 7

Hello Murali, thanks for reaching out. We have actually discovered recently that they Advent AC units are not compatible replacements for the Duo-Therm AC units. Our best option for replacing the Duo-Therm is the Furrion #FR42PV. This comes with a…

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Answer 8

We have the #ACDOM135 that is intended for replacing a Dometic setup. If this is what yo are installing, please check against the installation instructions included with your purchase but, the brown wire I think you are referring to from the control…

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Answer 9

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 10

Hi Zach, Yes, you can swap out your Dometic rooftop condenser unit with the Advent Air #ACM150. You'll just need to remove the cover to your air distribution box so that you can get to the mounting bolts and wiring. You'll want to find the…

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Answer 11

If you're replacing just the rooftop unit of your Dometic system with the Advent Air #ACM135 then it's a super easy swap out. You'll just need to trace the wire harness of the old rooftop unit to the controller. It's going to have a…

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Answer 12

Hey Christian, thanks for reaching out! I have a wiring diagram for the Advent Air RV Air Conditioner #ACM150 (see attached), but I unfortunately don't have a photo of the back of the plug itself. You should still be able to follow the diagram…

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Troubleshooting Advent Air RV AC Unit that Isn't Working with Dometic Thermostat

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