Mach 3 Plus (Signature Series)

Coleman-Mach Mach 3 Plus™ (Signature Series) – 13,500 BTU RV Air Conditioner

The Mach 3 Plus™ from the Coleman-Mach Signature Series is one of the most popular 13,500 BTU rooftop RV air conditioners ever built. Known for reliable compressor performance, strong airflow, and true bolt-in replacement compatibility, the Mach 3 Plus is a go-to upgrade for travel trailers, fifth wheels, and Class C motorhomes.

If you’re searching for:

• Coleman Mach 3 Plus 13,500 BTU

• Mach 3 Plus replacement unit

• Coleman 48203C866

• Best 13.5K BTU RV rooftop air conditioner

• Direct replacement Coleman Mach AC

You’re in the right place.

Why the Mach 3 Plus Is So Popular

13,500 BTU High-Output Cooling

Delivers fast temperature pull-down in hot climates while maintaining dependable cycling performance.

Direct 14" x 14" Roof Opening Fit

Designed to drop into standard RV roof cutouts without structural modification.

Compatible With Existing Coleman Controls

Works with many existing Coleman-Mach ceiling assemblies and thermostats (ducted and non-ducted setups available).

Proven Compressor Design

Built for vibration resistance and long service life in demanding RV conditions.

Optional Heat Strip Capability

Can be configured for electric heat strip installation for mild-weather heating support.

Signature Series – Active Air Conditioner SKUs

?️ Mach 3 Plus – Medium Profile (13,500 BTU)