The OEM-grade interior finishing piece your Coleman Mach lateral ducted system needs. This ChillGrille ceiling assembly installs inside the RV coach to direct conditioned air from your rooftop AC unit into the living space -- no heat pump function, cool-only airflow management in a clean white finish that matches factory coach interiors.
When your existing ceiling assembly is cracked, discolored, or damaged, this Coleman Mach 8430A633 ChillGrille is the correct OEM-specified replacement. It mounts to the interior ceiling of your RV at the AC drop point and serves as the interface between the rooftop unit and the cabin -- controlling airflow direction through lateral ducting rather than a central register.
The lateral ducted design means conditioned air exits through side vents routed along the ceiling toward the front and rear of the coach, delivering more even temperature distribution compared to a single center-dump assembly. This unit handles the cool-only function; it does not include heat pump controls or heat strip wiring.
Designed exclusively for cooling mode. No heat pump components -- ideal for rigs running cool-only AC configurations.
Routes conditioned air laterally through ceiling ducts for more even cabin temperature distribution front to rear.
Part number 8430A633 (vendor PN: CMN8430A633). Built to original equipment specifications for verified fitment.
Matches standard coach interior trim. Drop-in appearance replacement with no painting or modification required.
The ChillGrille ceiling assembly is the interior-mounted component of a ducted RV rooftop air conditioner. It attaches to the ceiling of the coach directly beneath the rooftop unit and connects to the duct system. It typically houses the thermostat controls, return air filter, and discharge louvers that direct airflow into the ducting network. This unit is the cool-only variant -- meaning thermostat and control functions are limited to cooling operation only.
A failed or damaged ceiling assembly will show symptoms like: rattling or vibrating louvers, broken thermostat knobs, cracked grille panels, or restricted airflow. Replacing the full assembly restores OEM function without the need to service the rooftop unit.
Part number 8430A633 is a direct Coleman Mach OEM replacement assembly. When ordering, confirm your existing ceiling assembly part number matches or is superseded by 8430A633 to ensure correct fitment for your coach and rooftop unit combination.
Not all Coleman Mach ceiling assemblies are interchangeable. The key distinction is ducted versus non-ducted (also called "register" or "direct discharge") designs:
Confirm your coach uses a lateral ducted configuration before ordering. Installing a non-ducted assembly in a ducted system -- or vice versa -- will result in poor airflow and possible mechanical issues.
This ceiling assembly is designed for cool-only Coleman Mach rooftop units. It does not include heat pump relay wiring, heat strip terminals, or dual-mode thermostat controls. If your rooftop unit is a heat pump model or you have an electric heat strip, this assembly is not the correct match -- you will need the heat/cool version of the ceiling assembly for your specific unit.
Cross-reference your existing ceiling assembly part number against 8430A633. Coleman Mach part numbers are typically printed on a label on the existing unit or listed in your coach documentation. If your assembly has heat pump or dual-mode controls, this is not the correct replacement.
This part is for lateral ducted systems only. If your current ceiling assembly discharges air straight down into the cabin with no duct connections at the sides, you have a non-ducted (direct discharge) unit and this assembly will not fit correctly.