Soft Start for Coleman Mach 10 AC Unit

Updated 08/25/2026 | Published 08/17/2026

Question:

I have a new coleman mach 10 ac unit. I need a part for a soft start kit.model number is 35203-0782. serial number is 260102635. init is 13.5 btu. looking for the kit is specific to my unit, Thanks for your help, James

asked by: james t

Expert Reply:

Hey James! You can use the Soft Start Kit for Coleman-Mach RV Air Conditioners # CM56RR with your Coleman Mach 10. It will work with your newer 35000 series in addition to the other ones listed on the product page.

What kind of trailer do you have and where do you typically camp?

expert reply by: Robin H

Coleman-Mach Soft Start Kit
(click to enlarge)

Doug S.

8/25/2026

I installed the kit on my series 4000 Coleman Mach AC in my Grand Design Reflection 5w. To test it out, I unplugged from shore power and used my little Honda 2000i generator as power.The AC powered up and ran easily with hardly a noticeable added load on the generator. Ran it for about 20 minutes more without issue. This kit ROCKS!

Robin H.

8/25/2026

@DougS that is a great test! Being able to fire up the AC on a small 2,000-watt generator really shows what the # CM56RR can do. Thanks for taking the time to report back.

Perry

8/25/2026

I put the recommended CM soft start on my 22' trailer that had a 15k AC on top. It tripped the gfci on a 15 amp c12ov circuit, but works fine on a 20 amp and also with my Honda 2200 generator. Great move I think.

Robin H.

8/25/2026

@Perry sounds like the # CM56RR is doing exactly what you needed with that Honda 2200. Appreciate you adding your results with both the 15A and 20A circuits too, that is helpful info for anyone considering the same setup.