Looking for Replacement Coleman Mach 13.5k AC Unit

Published 10/08/2026

Question:

Hello, considering replacing my ducted 13,500 btu Coleman Mach AC/Heat unit Model 45023-6794 with a compatible 15,000 btu unit. My current unit works but I live near DFW and it has trouble keeping up with the heat. Would like suggestions/options, willing to replace the rooftop unit only, must be compatible with my Firefly system and current thermostat etc. I have a 25 2023 Renegade Vienna. Have already installed a Softstart and KoolRV ducting. Thank you for your time and assistance. Dan

asked by: Daniel S

Helpful Expert Reply:

Hey Daniel, we won't be able to help you just do an upper unit replacement as what you have now uses an older type of refrigerant that is no longer supported. The air boxes and the upper units have to be designed both for the same refrigerant and what you have now is no longer legal to sell. Is a complete replacement setup on the table?

expert reply by: Jameson C