Seat Ibiza AC and Error Issues

That sounds frustrating! I had a similar issue with my Skoda Octavia a few years back. It wasn't exactly the same sensor, but the symptoms were almost identical: error message, the AC wouldn't kick on, and the engine felt like it was running hotter than usual. Did you check the engine cooling fan? Is it running constantly, or not at all?

Thanks! I did check the engine cooling fan, and it seems to be working fine. It cycles on and off as expected. You mentioned it wasn't the same sensor in your Skoda. Do you remember what exactly the problem was and how they fixed it? I'm just trying to get a better understanding of what could be going on before I take it to the shop.

Ah, okay, if the fan is working correctly, it probably isn't a simple overheating issue. In my Skoda, it turned out to be a faulty sensor calibration within the HVAC system itself. The error was triggering a safety mechanism that shut down the AC to prevent potential damage. They had to recalibrate the sensor and clear the error codes. Honestly, if you've already got the diagnostic pointing to the heat exchanger temperature sensor, it's probably best to take it to a reputable workshop. They'll be able to properly diagnose and replace the sensor. Trying to DIY it could cause more problems than it solves.

Okay, that's great to hear. I really appreciate you sharing your experience. I took it to a local garage, and they confirmed it's the temperature sensor in the heat exchanger that's gone bad. Looks like I'm looking at around 980€ for the repair, including a new sensor and labor. Hopefully, this resolves the issue with the air conditioning and the error message. Thanks again for your help!