CMAX AC Temperature Sensor Error

I'm getting an error on my 2013 Ford CMAX diesel about a defective temperature sensor for the heat exchanger. I've got 72349 km on it. The error is stored, shows in the speedometer, and the AC won't turn on. Could this be the AC control unit?

4 comment(s)

Sounds familiar. I had a similar thing with my old Renault Megane, though not exactly the same. Error codes pointed to a sensor, but it was a faulty control module. Is the engine overheating, or just the AC affected? Think of it like a fuse box; sometimes it's not the appliance, but the wiring.

Thanks! The engine temp seems normal. It's mainly the AC not working and the error messages. What was the fix for your Renault Megane?

Okay, no overheating. With my Megane, they first replaced the temp sensor, but it didn't fix it. The shop then found a bad AC control unit and replaced that. Sounds like your Ford CMAX has the same problem. Considering the symptoms and error codes, get the control unit checked. They should diagnose it properly.

Thanks for the advice. I took it to a shop, and it was a bad AC control unit. The repair was 980€. Your input helped guide the diagnosis.

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