vivientaylor7
Focus heat exchanger temperature sensor issue
Summary of the thread
A 2016 Ford Focus is experiencing issues with the temperature sensor on the heat exchanger, leading to error messages and a non-functional air conditioning system. The problem may be due to a malfunctioning sensor, as the system might incorrectly perceive the engine as overheating, thus disabling the A/C. A suggested solution is to perform a sensor calibration using a diagnostic tool or have the sensor checked and potentially replaced by a professional workshop.
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4 comment(s)
vivientaylor7 (community.author)
Thanks for the quick response! I haven't noticed any coolant leaks, and the temperature gauge seems to be reading normally. A sensor malfunction sounds plausible. When you had this issue, was it specifically related to the temperature sensor on the heat exchanger, or was it a different temperature sensor? Also, what do you mean by 'sensor calibration?' Is that something I can do myself?
james_neumann1
Ah, okay. By sensor calibration, I mean running a diagnostic procedure, often with a scan tool, that resets or recalibrates the sensor's readings. Some sensors can drift out of range over time. In my case, yes, it was the heat exchanger temperature sensor causing the problem. Seeing that you already checked the obvious things and it's pointing to that sensor, I'd suggest getting it checked out by a workshop. I ended up paying around 980€ to get mine fixed. It could save you a lot of time and potential further issues.
vivientaylor7 (community.author)
Thanks so much for confirming that. It sounds like I'm on the right track then. I'll take it to a workshop and have them diagnose the temperature sensor. I appreciate your help!
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FORD
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FOCUS
james_neumann1
Strange. I have a Focus too, and I had similar symptoms a while back. Was it a coolant leak issue perhaps? Or is your temperature gauge acting erratically? That could point to a sensor malfunction, which would explain why your A/C isn't kicking in. The system probably thinks the engine is overheating and shuts down the A/C as a safety measure. Did you try a sensor calibration?