The Coleman Mach 9330C755 is a factory-style replacement cool control kit designed for non-ducted and lateral ducted RV air conditioners that use a wall thermostat. It is heat-ready, meaning it also supports the addition of an optional electric heat strip for year-round climate control in a single unit.
When the control board or cool control assembly in your Coleman Mach air conditioner fails, comfort goes out the window fast. The 9330C755 kit gives you a direct, factory-compatible replacement that restores full cooling operation and keeps the door open for heat strip integration -- without rewiring or retrofitting your existing setup.
This kit is engineered specifically for non-ducted and lateral ducted Coleman Mach air conditioner configurations that rely on a wall-mounted thermostat for temperature control. If your unit currently uses a wall thermostat and does not route conditioned air through ceiling ducts, this is the correct kit for your application.
Pre-wired to accept an optional electric heat strip upgrade without additional modification to the control circuit.
Designed for units controlled by a separate wall thermostat -- not an integrated ceiling assembly controller.
Correct kit for open-air ceiling units and lateral duct configurations. Not for standard top-discharge ducted systems.
Matches the original factory wiring scheme and mounting configuration for straightforward swap-out installation.
The cool control kit is the primary electrical control assembly inside the air conditioner head unit. It manages the relay and switching logic that tells the compressor and fan motors when to run based on thermostat input. Over time, these boards and relay assemblies fail from heat cycling, voltage spikes, and vibration common in RV use. Replacing the cool control kit restores proper compressor cycling and fan staging without replacing the entire air conditioner.
A heat-ready control kit includes the wiring provisions and relay contacts needed to run an optional electric heat strip installed inside the air conditioner shroud. The heat strip itself is a separate accessory and is not included with this kit. If you already have a heat strip installed, this kit will control it. If you plan to add one in the future, this kit is already prepared for that upgrade.
By selecting the heat-ready version, you are not locked into cooling-only operation. When paired with a compatible Coleman Mach electric heat strip (sold separately), this control kit manages both heating and cooling from your existing wall thermostat -- making it a practical long-term solution for full-timers and shoulder-season campers.
Coleman Mach air conditioners come in several configurations. Choosing the wrong control kit is one of the most common installation mistakes. Here is a quick guide:
This kit is designed for systems where temperature is controlled by a wall-mounted thermostat, not by an integrated ceiling assembly with its own control interface. If your existing setup uses a Coleman Mach digital wall thermostat or analog wall thermostat, this kit is compatible with that wiring scheme. If you use a ceiling assembly with built-in controls (no wall thermostat), verify compatibility before ordering.
The 9330C755 is heat-ready, meaning it can support an electric heat strip -- but the heat strip is sold separately. Do not assume heating capability is included out of the box. Cooling operation is fully functional with this kit alone.