Replacement AC for Coleman Mach 15 48254C869
Updated 12/29/2025 | Published 12/05/2025
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Question:
So is the replacement recommendation still true. For my mach 15, 48254C869
asked by: Lewis
Expert Reply:
Hey Lewis! I'm sorry to say the ACCOL150B is no longer a valid replacement recommendation for your Coleman Mach 15 AC. Everything switched to the new R32 refrigerant this past year due to EPA regulations. The new systems are not backwards compatible with R410A parts so complete replacement is required. Sticking with Advent Air you can choose from the following:
-Advent Air RV Air Conditioner System - Manual - 15,000 Btu - White - R32 # ADV32SR or # ADV42SR (Black)
-Advent Air RV Air Conditioner System - Manual - 13,500 Btu - White - R32 # ADV23SR or # ADV75SR (Black)
-Advent Air RV Air Conditioner System - Single Zone - 15,000 Btu - White - R32 # ADV92SR or # ADV62SR (Black)
-Advent Air RV Air Conditioner System - Single Zone - 13,500 Btu - White - R32 # ADV95SR or # ADV52SR (Black)
The manual systems work with ductless setups and the single zone is designed for both ducted and ductless. An optional heat strip # ADV34QR is also available. All of these are complete systems so they will work as a replacement for your existing AC.
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Robin H.
12/29/2025
Hey Lewis, how did things go with the Advent Air system for your Mach 15 replacement? Did one of the R32 models end up fitting your setup well? Your update could make it easier for others facing the same switch from R410A units.