Description
The Coleman-Mach 38203-066 is the textured-white Signature Series Mach 3 Plus, a 13,500 BTU rooftop air conditioner for RVs. Its medium-profile shroud houses the manufacturer’s raised-lance-fin evaporator and condenser coils, engineered to dissipate heat efficiently. This is a cooling-only rooftop unit; ceiling air distribution must be configured separately.
Exact Coleman-Mach specifications
- Manufacturer / series: Coleman-Mach Mach 3 Plus
- Exact rooftop manufacturer MPN: 38203-066
- Cooling capacity: 13,500 BTU/h
- System configuration: ducted or non-ducted with a matched indoor system
- Air conditioner type: Rooftop refrigerant cooling, not an evaporative cooler
- Electric supply: nominal 115–120V AC, 60 Hz; use nameplate for circuit protection
- Shroud: Textured White, medium-profile
- Manufacturer rooftop dimensions: 13.8 in high × 26.1 in wide × 38.0 in long (textured housing)
- Refrigerant: Confirm on the supplied rooftop rating plate; Coleman-Mach has transitioned the 38000 family to R32 and older production may differ
- Heating: No built-in heat pump; compatible optional electric heater may be fitted using manufacturer-approved components
- Soft start built in: Not represented as included with this MPN
- Condition: New
Product design and performance
Cooling construction: Coleman-Mach specifies large copper evaporator and condenser coils with raised lance fins and gas-flux-brazed joints for the Mach 3 Plus. Its nominal airflow is 320 CFM; the manufacturer lists 12.8 A cooling current and a reference weight of 79.5 lb for this family. Always use the rooftop nameplate for the final circuit requirement.
Ceiling system and fitment
Ducted or non-ducted installations require the appropriate Coleman-Mach ceiling assembly, control kit and/or wall thermostat; these are not included with the roof unit. Select by both the RV's air distribution layout and the control voltage and thermostat wiring.
Included product: One rooftop air-conditioning unit. Interior ceiling assembly, wall thermostat, optional heater and standalone accessories are separate unless a particular kit is expressly stated. Confirm the RV roof opening (typically 14 × 14 in), roof thickness, wiring and compatible ceiling part number before purchase.
Installation and warranty
Compare the entire original rooftop MPN and control-system type before replacing an RV air conditioner. Refrigerant, electrical current and safety instructions should be taken from the rating plate on the specific supplied unit, not from a different Coleman-Mach generation. Qualified installation is recommended.
Coleman-Mach's 2025 catalog describes a limited two-year manufacturer warranty for these air-conditioner families, subject to the written coverage and installation terms.
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