Coleman-Mach 6536C3209 Control Board Replacement Kit

The Coleman-Mach 6536C3209 is the factory control board replacement kit for the Coleman-Mach 6536 series rooftop air conditioner. If the AC on your rig has quit responding and you've traced it back to the control board, this is the part that brings it back to life. It's a genuine Coleman RVP kit, not a guess-and-hope aftermarket board, so it drops into the 6536 series the way the original did.

A rooftop AC control board is the brain of the whole unit. It reads the thermostat, tells the fan and the compressor when to run, and manages the timing that keeps the compressor from short-cycling. When that board goes, the symptoms are all over the map. Maybe the fan runs but the compressor never kicks in. Maybe nothing happens at all when you call for cooling. Maybe the unit powers up but ignores the thermostat completely. Boards fail from heat, age, power surges at the pedestal, and the general beating a rooftop unit takes over years of travel. Before you condemn the whole air conditioner and start pricing a full replacement, it's worth checking the board first. It's a fraction of the cost of a new unit.

This kit is built for the 6536 series specifically. Coleman-Mach uses a model number stamped on the data plate of the AC itself, usually up on the roof or inside the interior ceiling assembly. Pull that model number and confirm it lands in the 6536 family before you order. Getting the model right matters, because Coleman-Mach control boards aren't universal across the whole lineup. The 6536 board talks to the 6536's fan motor and compressor the way they expect, and a board from a different series won't.

What you're replacing here is the original air conditioner control box, sometimes called the P.C. board, that lives inside your 6536 unit. Coleman-Mach designed the 6536C3209 as a direct replacement, so the mounting points and the connector layout line up with what's already there. There's no adapter to fabricate and no rewiring the whole harness. That's the whole point of an OEM board over a generic one. It fits, it talks to the right components, and it behaves like the factory board because it is the factory board.

Coleman-Mach 6536 units are the kind of rooftop AC an RV manufacturer installs at the factory, mounted off the roof and fed through the ceiling assembly. That means the install isn't hard, but it does put you on the roof and inside the shroud. The kit ships with the manufacturer's installation instructions, so you'll have the wiring diagram and the step-by-step in hand. If you're comfortable pulling the shroud, disconnecting the harness, and swapping a board, it's a very doable afternoon job. If you'd rather not climb up top or fuss with 120-volt wiring, any RV service center can knock it out quickly.

One thing we'll say plainly: kill the power first. Unplug from shore power and shut off the unit at the breaker before you touch anything. A rooftop AC runs on 120 volts, and the last thing you want is to be reaching into a live control box on a hot roof. Once power is off, the swap is mostly a matter of noting where each wire lands, moving the connections to the new board one at a time, and buttoning it back up. Take a photo of the old board's connections before you start and you'll thank yourself later.

Buy it from us and you're getting the genuine Coleman RVP part with the full manufacturer warranty behind it. We stock real RV and marine parts, we ship in-stock items same day when you order before 3 PM ET, and if you're not sure whether this is the right board for your unit, just ask us before you order. We'd rather spend two minutes confirming your model number than have you wait on the wrong part.