Best Way to Replace a Dometic 457915.711CO Air Conditioner

Updated 09/29/2025 | Published 09/02/2025

Products Featured in This Question

GE Appliances Deluxe RV AC System w/ Heat Pump, ADB & Thermostat - 13,500 Btu - Ducted - White - R32

(9)

$931.89

GE Appliances Deluxe RV AC System w/ Heat Pump, ADB & Thermostat - 13,500 Btu - Non-Ducted - R32

(9)

$1356.13

Question:

My present unit is 457915.711CO. will this work?

asked by: Dale

Expert Reply:

Hey Dale. To replace your Dometic 457915.711CO AC unit you'll need to replace the entire system. None of the newer units are compatible with the older Dometic air boxes because all of the old R410A units and their parts are being phased out. If you find a replacement that has the same connector the pin functions are going to be different and you'll void the warranty on your brand new AC unit. Replacing the entire system will allow you to avoid any compatibility issues and upgrade to an AC unit with the new R32 refrigerant.

For a replacement 13,500 btu system with heat, I recommend the GE Appliances Deluxe RV AC System item # GE52ZR for a ducted system or item # GE64RR for a ductless setup. These systems come with the AC unit, air box, thermostat, and a built in heat up.

What kind of trailer or motorhome do you have?

expert reply by: Jerred H

Jerred H.

9/29/2025

Hey Dale, did you find a replacement system that worked for your setup? I'm asking because it could help others who are looking to upgrade their AC units.