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ottoshadow1

Ranger AC and Sensor Issues

My 2005 Ford Ranger, gasoline engine, is showing some weird behavior. The error memory has logged a temperature sensor heat exchanger defect. I'm also getting an error message on the speedometer, and the AC won't turn on. Mileage is at 247335 km. Any ideas?

Summary of the thread

A 2005 Ford Ranger exhibited issues with the AC not turning on and an error message on the speedometer, alongside a logged defect in the temperature sensor heat exchanger. The problem was traced to a faulty air conditioning control unit and a defective temperature sensor. Replacing these components resolved the issues, restoring normal function to the vehicle.

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4 comment(s)

RenniAlb

That sounds familiar. I had a similar issue with my old Opel Astra, although the error code was different. The AC wouldn't kick in, and it turned out to be related to a sensor in the cooling system. Was the coolant level checked?

ottoshadow1 (community.author)

Coolant level seems fine, I checked that first. Are you saying a faulty sensor can stop the AC from working completely?

RenniAlb

In my case, yes. The sensor malfunction was preventing the AC compressor from engaging. Considering the stored error and the symptoms, I would strongly recommend having a workshop inspect the air conditioning control unit. It could be defective.

ottoshadow1 (community.author)

Thanks for the advice. The workshop confirmed your suspicion: defective air conditioning control unit, also the temperature sensor heat exchanger was indeed faulty. Total cost 980€. Replaced both and everything is working as expected.

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FORD

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RANGER