Can Advent Air Upper AC Unit Connect to Dometic Lower Air Box
Updated 10/30/2025 | Published 09/30/2025
Question:
Hello, I have a 2010 camper that Im looking to replace the ac. It currently has the original Dometic 457915.701 Duo Therm. It is a ducted unit that is controlled by the thermostat on the wall, which also controls the gas furnace. My question is does Advent offer a direct replacement that will work with the original six pin wiring harness from the Dometic. I know GE offers a direct replacement but before I spend $1400 I wanted to see if Advent offered a replacement.
asked by: Justin D
Expert Reply:
Hey Justin, at one point we actually carried a part number from Advent Air that was supposed to do exactly what you are wanting by allowing an Advent upper unit to install to a Dometic lower air distribution box but what we found was that it was not reliable and caused a lot of issues so we stopped carrying it. Also worth mentioning is that there was a recent refrigerant change required in January of 2025 so older lower units can't work with modern upper units anyway.
I would have to recommend replacing the entire setup instead like with the # ADV92SR.
Product Page this Question was Asked From
Advent Air RV Air Conditioner - 15,000 Btu - White - R32
- RV Air Conditioners
- AC Unit Only
- Cool Only
- 15000 Btu
- 115V
- Single Zone
- Rooftop
- Ducted
- Ductless
- White
- Advent Air
more information >
Featured Help Information
Instructions
Continue Researching
- Q&A: Upgrading from 13,000 BTU A/C to 15,000 BTU Coleman-Mach Roughneck A/C
- Q&A: Can Advent Air RV AC Unit Replace Dometic Brisk
- Q&A: Wiring Diagram for Advent Air Conditioner ACM135
- Q&A: Troubleshooting Installing Head of B&W Companion 5th Wheel
- Q&A: Direct Replacement for Carrier Air V RV Air Conditioner
- Q&A: Replacement AC System for a Older 410a Ducted Dometic B57915-711 AC
- Q&A: Upgrading Coleman Mach 13.5K BTU AC Unit From 2021 To New 15K BTU Unit
- Article: How to Choose the Best RV AC Unit (2025)
- Article: Best Bike Racks for Electric Bikes
- Article: How to Choose the Right Trailer Hitch Class
- Article: Best 2018 Trucks for Towing a 5th Wheel
- Article: Brake Controller Installation: Starting from Scratch
- Article: How (and Where) to Connect an RV Propane Grill
- Article: 4 Steps to Choosing Your 5th Wheel Pin Box
Jameson C.
10/30/2025
Hey Justin, how did things go with replacing the AC on your camper using the full Advent setup? Your results could really help others deciding between keeping their old lower unit or upgrading everything together.