The direct OEM replacement ceiling plenum for non-ducted Coleman Mach rooftop air conditioner installations using a wall-mounted thermostat. Restores proper airflow distribution and a clean factory appearance -- without the cost of replacing the entire ceiling assembly.
When your Coleman Mach ceiling assembly cracks, yellows, or becomes damaged, you don't need to replace the entire air conditioner. The 9430-4552 ceiling plenum is designed specifically for non-ducted applications where a wall-mounted thermostat controls the unit -- not a ceiling-mounted control box.
This plenum-only replacement seats between the rooftop Coleman Mach AC unit and your RV's interior ceiling, directing conditioned air into the living space. It is the interior-facing white housing that channels airflow from the evaporator -- not the control box, not the thermostat, and not the complete ceiling assembly kit.
Routes conditioned air directly into the living space without ductwork -- ideal for Class A, Class C, and travel trailer single-zone setups.
Configured for use with a separate wall-mounted thermostat, not a ceiling control kit. No integrated control wiring or display.
Genuine Coleman Mach replacement part number 9430-4552. Maintains factory fit, finish, and airflow geometry.
Standard white ABS-style housing matches most RV interior ceiling panels for a clean, factory-correct appearance.
The ceiling assembly plenum is the interior portion of your rooftop air conditioner -- the white housing visible from inside the RV. It mounts to the ceiling and connects to the rooftop unit above. The plenum contains the return air grille openings, the evaporator blower housing, and the discharge louvers that distribute cool or heated air into the cabin.
Over time, plenums can crack from UV exposure, physical contact, or age-related brittleness. Replacing only the plenum restores function and appearance without requiring a full AC unit replacement or rooftop work.
This listing is for the plenum housing only. It does not include a thermostat, control board, capacitors, wiring harness, or ceiling assembly hardware kit. If you need the complete ceiling assembly with control box, search for the appropriate full-kit part number for your model.
A non-ducted system delivers air directly through the ceiling plenum into one zone of the RV. The blower and return air openings are visible on the plenum face. This is the most common configuration in single-AC RVs.
A ducted system connects to a duct network in the ceiling and distributes air through multiple vents throughout the coach. Ducted and non-ducted plenums are not interchangeable -- confirm your system type before ordering.
Coleman Mach ceiling assemblies come in two wiring configurations: one for use with a wall-mounted thermostat (this part) and one for use with a ceiling-mounted control kit. The internal wiring and connector layout differ between the two. Verify your existing thermostat location before purchasing.
Coleman Mach produces multiple ceiling plenum configurations across different AC tonnage ratings and model generations. Cross-reference your rooftop unit's model number -- found on the rooftop label -- with Coleman Mach's compatibility documentation or your dealer to confirm 9430-4552 is the correct replacement for your specific unit.