The direct OEM-style replacement ceiling assembly for Coleman Mach lateral ducted rooftop air conditioners. This white cool-only assembly mounts inside your RV ceiling and channels conditioned air through your existing lateral duct system -- no thermostat wiring required if you are retaining your existing wall thermostat.
When your original Coleman Mach ceiling assembly cracks, discolors, or stops sealing properly, the 8330A733 is the correct replacement for lateral ducted installations. "Lateral ducted" means cooled air exits through ducts that run along the side walls or ceiling of the coach -- not through a center diffuser -- making this assembly incompatible with non-ducted or centrally ducted units. Getting the right assembly for your duct style is critical for proper airflow distribution throughout the RV.
This is a cool-only assembly, meaning it does not include heating elements or heat-pump circuitry. It pairs with the cold-air delivery side of your Mach rooftop unit. The white finish blends with standard RV ceiling panels and resists yellowing under normal interior UV exposure.
Designed exclusively for lateral ducted Mach installations. Not compatible with non-ducted or center-discharge ceiling assemblies.
Works with the cooling function of your Mach rooftop unit. No heat strips or heat-pump components included.
Thermostat is not included. Use your existing wall thermostat or purchase a compatible Coleman Mach thermostat separately.
White interior finish matches standard Coleman Mach ceiling assemblies and most RV interior trim.
Part number 8330A733 (vendor part CMN8330A733, UPC 755790201280) is a genuine Coleman Mach replacement assembly. It is designed to mount directly to the ceiling cutout used by compatible Mach series rooftop units without modification, preserving the original duct connections and blower housing interface.
The ceiling assembly (also called the air distribution box or ceiling unit) is the interior portion of a split-style RV rooftop air conditioner. The rooftop unit sits on the roof and handles refrigerant and condensation; the ceiling assembly mounts inside the coach and contains the evaporator coil, blower fan, and air distribution plenum. This part is the interior component only. The rooftop unit is sold separately.
This assembly is built for lateral ducted configurations where supply air flows through ducts running along the coach walls or overhead. If your existing ceiling assembly has a center diffuser grille or no ductwork at all, this is not the correct part. Check your existing Coleman Mach ceiling assembly model number before ordering.
Because this assembly ships without a thermostat, it is intended for installations where a wall thermostat is already present or will be added separately. Compatible Coleman Mach analog and digital thermostats connect to the standard Mach control terminals. If you need a thermostat, look for Coleman Mach 7-series or 8-series wall thermostats rated for cool-only or heat-cool operation depending on your rooftop unit.