Can I Swap Out 2 Coleman Mach AC Units For The Models With Heat Pump Built-In?

Published 10/27/2026

Products Featured in This Question

Electric Heater Kit for Coleman-Mach Medium and Low-Profile RV Air Conditioners - 120V

(7)

$90.19

Coleman-Mach 120 V Heater Kit for 37 Series and 47 Series RV Air Conditioners

$92.93

Coleman-Mach Signature Series Mach 15 HP2 RV Heat Pump - 15,000 Btu - Textured Black

$1334.17

Question:

like to swap out the 2 cooling only Coleman mach to the heat pump mach. what all is needed?especially the t stat wire, would I have to run new wire?

asked by: Joe M

Expert Reply:

Good morning Joe,

You have a couple of options for adding heat to your existing Coleman-Mach setup.

If you just want supplemental heat, you may be able to add a heat strip to each existing AC. We have the Coleman-Mach # CM96RR for compatible medium- and low-profile Mach units, or the # CM24MR for select 37 and 47 Series units. These are good for taking the chill out of the air but won't provide as much heat as a true heat pump.

If you want actual heat pumps, you'll need to replace the rooftop units with something like the Coleman-Mach Mach 15 HP2 # CM28MR. This is the rooftop unit only, so you'll also need compatible heat-pump controls.

You may be able to reuse your existing thermostats, control boxes, and ceiling assemblies if they're compatible. Otherwise, we can put together a complete setup with new heat-pump thermostats and controls. Your existing thermostat wiring may also be reusable, depending on the wiring configuration.

Are your two AC units controlled by separate thermostats or one multi-zone thermostat? Also, could you provide the model numbers of your current AC units and thermostats? That'll help me check what we can reuse and whether adding heat strips would be a simpler option!

expert reply by: Andrew N

Joe M.

10/27/2026

Good morning and thanks for the quick response. The unit is a ducted system. Controlled by airxcell. The number i can see behind the stat is spcb-2 Pcb1564-5a. Rooftops are controlled by 1 stat. Look like there's plenty of wire. Rooftop info located inside space above the filter. Mach 8 15 a/c Item# 47204-076 Serial# 230017220.

Andrew N.

10/27/2026

@JoeM Thanks for the extra info, Joe! It looks like upgrading to the Coleman-Mach Heat Pump # CM28MR would require compatible heat-pump controls. We have the CHILLGrille Ceiling Assembly # CM48GR and Heat Pump Control Kit # CM84MR, although we'd need to verify the correct multi-zone components since you're operating two units from one thermostat. There's a chance your existing thermostat and wiring can be reused, but we need to identify the thermostat before confirming that. Your current ducted ceiling assemblies may also be reusable. Could you send me a picture of your thermostat, including the model number on the back? The numbers you provided didn't identify the specific model, and I'd like to see if we can keep your existing setup rather than replace more than necessary. Some of those Airxcell / Coleman thermostats work with heat pumps while some do not, according to my research.

Joe M.

10/27/2026

@AndrewN How could I send pictures on thus chat.