Is There a 15,000 Btu Replacement AC Unit for a Dometic B57915.711C0?
Updated 04/27/2026 | Published 04/23/2026
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Question:
Is there a 15,000 BTU replacement ac unit for B57915.711C0 on a 2018 Forest River 255RR?
asked by: Chris A
Expert Reply:
No, not anymore Chris. You have to replace the AC unit, air distribution box, and thermostat. The EPA mandated a refrigerant change Jan 2025, which made the AC system components that came out before that incompatible with the newer systems.
To replace your Dometic B57915.711C0 with a 15,000 btu system, I recommend the Advent Air RV Air Conditioner System item # ADV62SR in black or item # ADV92SR in white.
These systems are designed for ducted or ductless applications and will install using the existing cutout and wiring. They include a 15,000 btu air conditioner with R32 refrigerant, an air distribution box, a start capacitor, and a thermostat.
Are you replacing the main AC unit or did you add a second one for the bedroom that needs to be replaced?
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Advent Air RV Air Conditioner - 15,000 Btu - Ducted or Non-Ducted - Black - R32 - AC Unit Only
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- 15000 Btu
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- Black
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Chris A.
4/26/2026
Replacing the main unit.