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  1. RV Air Conditioners
  2. Coleman-Mach
  3. 15000 Btu
  4. Complete AC System
  5. Ducted
  6. Cool Only
Coleman-Mach Signature Mach 15 RV Air Conditioner System - 15K Btu - Ducted - Textured Black - R32
Coleman-Mach

Coleman-Mach Signature Mach 15 RV Air Conditioner System - 15K Btu - Ducted - Textured Black - R32

Part Number: CM42RR
In Stock
$1,549.79
RV Air Conditioners
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In Use/Installed

Your old AC couldn't keep up. This ducted kit delivers powerful cooling through every vent, with matched components for a smooth install and the reliability to keep your RV comfortable season after season. Great Prices for the best rv air conditioners from Coleman-Mach. Coleman-Mach Signature Mach 15 RV Air Conditioner System - 15K Btu - Ducted - Textured Black - R32 part number CM42RR can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Coleman-Mach RV Air Conditioners - CM42RR

Highlights

  • Cool Larger Spaces Fast: 15,000 Btu system moves air through ducts for quick, even cooling.
  • Less Guesswork on Install: Matched rooftop unit, air box, and thermostat simplify setup.
  • Easy Ceiling Control: Simple knobs and adjustable louvers manage airflow without remotes.
  • More Headroom Inside: Slim air box sits close to the ceiling for better cabin clearance.
  • Straightforward Maintenance: EZReach filter pulls out for rinsing—no tools required.
  • Optional Heat on Cold Mornings: Prepped for 5,600 Btu heat strip (sold separately).

Features to know about

Cools Down Fast in Summer Heat: 15,000 Btu of Powerful Airflow

When the temperature inside starts climbing, this 15,000 Btu system gets right to work. It moves air through your ceiling ducts to cool the space evenly and drops temps in minutes instead of hours. The R32 refrigerant keeps it efficient and compliant with 2025 EPA regulations, so you get strong performance without wasted energy.

Installs Smoothly With Matched Components: Complete Ducted Kit

Getting the right parts to work together can be a headache. This kit solves that by pairing a rooftop unit, air distribution box, and thermostat that are made to match. It fits a standard 14-1/4" × 14-1/4" opening and includes clear instructions to make setup straightforward and reliable whether you’re doing it yourself or helping someone else install it.

Easy Control Right at the Ceiling: Simple Knobs and Adjustable Louvers

No need to reach for a remote or climb over furniture. The air distribution box gives you direct control with easy-to-grip knobs right where you can reach them. Open the louvers for cool air straight into the cabin or close them to send air through ducts. The slim 1-1/2" thick box keeps overhead space open, and the swing-open grille lets you pull and rinse the EZReach filter without tools.

Ready for Cool Mornings: Optional 5,600 Btu Heat Strip Support

When it’s not cold enough for the furnace but still chilly, this system is set up for an optional 5,600 Btu heat strip (sold separately). It adds gentle warmth without a big power draw or noise, making early mornings and late nights more comfortable.

Built to Last Season After Season: Durable Design and Solid Performance

The textured black rooftop unit and white air distribution box are made with quality materials that hold up through heat, road vibration, and time. With voltage rated at 12V DC and amperage draws of 13.9 amps (cool), 16 amps (heat), and 18 amps (desert), it delivers consistent cooling power while staying dependable trip after trip.

Specs

Capacity

  • Cooling capacity: 15,000 Btu per hour

Dimensions and Weight

  • Overall: 38-3/16" long x 28-3/16" wide x 13-15/16" tall
  • Opening size: 14-1/4" long x 14-1/4" wide
  • Air distribution box: 20" long x 19" wide x 1-1/2" thick
  • Thermostat: 4" tall x 2-1/2" wide x 1" thick
  • Weight: 85 lbs

Power and Operation

  • Voltage: 120 Volt AC
  • Amperage (Cool): 13.9 amps
  • Amperage (Heat): 16 amps
  • Amperage (Desert): 18 amps
  • Refrigerant: R32 to meet 2025 EPA regulations

Color

  • Air conditioner: Textured black
  • Air distribution box: White
  • Thermostat: Black

Warranty

  • Air conditioner: 2-year limited
  • Air distribution box: 1-year limited
  • Thermostat: 1-year limited

Additional Specs

  • Capacity: 15,000 Btu per hour
  • Air conditioner overall dimensions: 38" long x 28-1/16" wide x 13-13/16" tall
  • Opening size: 14-1/4" long x 14-1/4" wide
  • Voltage: 120 Volt AC
  • Amperage (Cool): 13.9 amps
  • Amperage (Heat): 16 amps
  • Amperage (Desert): 18 amps
  • Color: Textured white AC, white air distribution box, black thermostat
  • Warranty: 2-Year warranty

38264-069 Coleman Mach Signature Mach 15 RV AC - 15K Btu - Textured Black

8430A633 Coleman Mach Chill Grill Air Distribution Box for Ducted RV ACs - White

9420A382 Coleman Mach Single-Zone Digital Wall-Mounted Thermostat with Plugs for RV ACs - Black





Ratings & Reviews

4.8

12 reviews
Review sort icon
Your old AC couldn't keep up. This ducted kit delivers powerful cooling through every vent, with matched components for a smooth install and the reliability to keep your RV comfortable season after season.

by:



by:

Haven’t installed yet but the product came in properly.
Thanks



by:

E-trailer is the place to buy delivery purchasing everything all good the Coleman air conditioning rooftop no problems simple to install and works great



by:

The units were in great shape as they were delivered. when I was putting in my order the screen said Sunday delivery, when I submitted the order it changed to Monday, when I tracked the order it said Tuesday. It was Tuesday that it was delivered. that is the only negative thing about my order. everything else is as ordered. I did not realize I ordered the units with the control knobs but that was my mistake. I really needed the ones with the thermostat controls. If there is a kit to switch it from the knobs to the thermostat I would love to know what it is.



by:

Came slightly damaged but nothing that couldn’t be straightened. Unit works very well. It was certainly a positive upgrade



by:

Ac unit was good the heating element did not work for that control box



by:

It was an easy replacement for my 22 year old Coleman Mach 15 btu heat pump. The compressor was tired and noisy. I was told I couldn't use my existing thermostat
and would need to use the one supplied in the kit. This was incorrect, I made a schematic combining wire color and pin designation for operation minus heat pump. The existing thermostat operates the A/C and gas heater as before.
The new system works fine and is quiet.
What should I do with the supplied thermostat??



by:

I've replaced several various units on various trailers and so far this has been my favorite unit to work on and seemed to blow cold the best



by:

We received the air conditioning system quickly. I had only one issue with one of the brackets. It was bent on arrival but I was able to bend it back into shape. We installed the unit and it works great!



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Excellent customer service and proper, product knowledge!


12
12

See what our Experts say about this Coleman-Mach RV Air Conditioners

  • Replacement for Coleman-Mach AC on Travel Trailer
    Hey Kyle! You can replace your old Coleman-Mach AC with one of the new ones. However, you will need to replace the thermostat and air distribution box as well. All of the new AC units use R32 refrigerant following the 2025 EPA guidelines so any old R410A components aren't compatible. We have 13,500 Btu or we have the 15k units if you want to upgrade. You can choose from the following based on color and ducted/ductless: -Coleman-Mach Signature Mach 3 RV AC System - Ductless - 13,500 Btu...
    view full answer...
  • Replacement AC System For a 2014 Sunnybrook Raven 5th Wheel
    Hey David. AC replacements don't come as an easy process these days. There was a recent mandate that required all new AC units to start using the R32 refrigerant. Because of that change, older components are not compatible with the newer AC's. The only AC systems I have that would prevent any sort of ceiling work would be the Velit 2000U Under-Bench AC systems. They come in a 12V part # VE56QV, 24V part # VE36QV, and a 48V part # VE96QV. These are more geared for camper vans or smaller...
    view full answer...
  • Difference Between Coleman-Mach Roughneck Mach 15 and Signature Mach 15
    Hey Bill, great question! The Signature Mach 15 is your standard AC unit which is probably what you want. The Roughneck has a fortified interior making it ideal for off-road and heavy industrial vehicle applications. Basically it is made to take more of a beating. If you had an old carrier and it is wearing out from use over time (I'm guessing that is the case here) the Signature is what you want. If you have been off-roading with your trailer lately and it killed off the Carrier then...
    view full answer...
  • Can Coleman-Mach Signature Mach 15 Replace Front and Middle AC on 2018 Momentum 395M
    Hi Kohlton; the Coleman-Mach Signature Mach 15 # CM89RR is a new R32 AC unit. Everything switched to R32 refrigerant last year due to new EPA regulations. Since these operate at different pressures and temperatures they aren't backwards compatible, so you will have to install a new air distribution box (ADB) and thermostat to go with it. The part number for the complete system is # CM42RR. The new thermostats will replace the old ones, and the one in the middle will be compatible with...
    view full answer...
  • Can Furrion Chill HE Replacement AC Replace Coleman Mach 8 in 2020 Vanleigh Beacon
    Hi Jake; the Furrion Chill HE Replacement RV Air Conditioner for Coleman Setup # FR32PV is an old kit that is on its way out. We no longer recommend replacing just the AC unit, and can't guarantee this will work as a plug and play replacement. We have had customers in the past successfully swap them out, others have found the connector doesn't work, sometimes the systems don't work together, and occasionally mixing up the AC with other components burns out the air distribution box (ADB)....
    view full answer...
  • Of Plug-In Replacement For Coleman Mach 15 AC Unit On 2016 Keystone Impact TT Toy Hauler
    Hello Shayne, thanks for reaching out. We do have an option for replacing your Coleman Mach 15 AC, but I am sorry to say there are no plug-and-play replacements for this. Reason being is all new RV AC units changed over to a new R32 refrigerant starting in 2025. These new units are not backwards compatible with old pre 2025 AC systems. So you will need to replace your rooftop unit, controller, distribution box and thermostat. For that, I recommend the following: - Coleman-Mach Signature...
    view full answer...
  • Can Coleman-Mach AC Replace Dometic Duo-Therm on 2014 Forest River Travel Trailer
    Hey Earl! Yes, the Coleman-Mach Signature Mach 15 AC system can replace your old Dometic Duo-Therm. These are new R32 refrigerant units (everything is as of 2025) so a complete replacement will be necessary. You can choose from the following based on ducted/ductless and the color: -Coleman-Mach Signature Mach 15 Air Conditioner System - Ductless - 15,000 Btu - Textured White # CM43RR -Coleman-Mach Signature Mach 15 Air Conditioner System - Ductless - 15,000 Btu - Polished White # CM93RR -Coleman-Mach...
    view full answer...
  • Does The Coleman-Mach Signature Mach CM42RR Include A Control Box?
    Hi Jesse! The Coleman-Mach Signature Mach 15 RV Air Conditioner System - Ducted - 15,000 Btu - Textured Black # CM42RR is a complete set up and does indeed include the control box. I have all the included components broken down below: Coleman-Mach Signature Mach 15 Air Conditioner - 15,000 Btu - Textured Black - AC Unit # CM89RR Coleman-Mach ChillGrill Air Distribution Box for Ducted RV Air Conditioners - White # CM36RR Single Zone Digital Thermostat for Coleman-Mach RV Air Conditioners...
    view full answer...
  • Can Coleman-Mach Signature Mach 15 Be Installed on 2018 Jayco Octane SL
    Hi Martin! Yes, the Coleman-Mach Signature Mach 15 can be installed on your 2018 Jayco Octane SL. However, you're going to need the complete system. All of the AC units moved to R32 refrigerant last year and these new units aren't backwards compatible with old R410A setups. You can choose from the following based on ducted or ductless: -Coleman-Mach Signature Mach 15 RV AC System - Ducted - 15,000 Btu - Textured Black # CM42RR -Coleman-Mach Signature Mach 15 RV AC System - Non Ducted...
    view full answer...

Do you have a question about this RV Air Conditioner?


Info for this part was:

Employee Mary K
Edited by:
Mary K
Employee Matthew S
Written by:
Matthew S
Employee Daron K
Updated by:
Daron K
Employee Amanda M
Updated by:
Amanda M
Employee Michael B
Updated by:
Michael B
Employee Dawn Z
Updated by:
Dawn Z
Employee Sabrina W
Updated by:
Sabrina W
Employee John S
Video Edited:
John S
Employee Andy C
Installed by:
Andy C
Employee Kevin C
Test Fit:
Kevin C
Employee Thomas T
Video by:
Thomas T

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