Impala temperature sensor AC issue

Wow, sounds frustrating! I had something kinda similar happen with my old Volvo V70, a different beast altogether, but maybe the core issue is the same? It was throwing all sorts of weird codes and the climate control was acting bonkers. I remember tearing my hair out trying to figure out if it was the sensor itself or something deeper in the cooling system. Did you check for any obvious leaks or damage to the heat exchanger? Have you tried looking at the live data from the temperature sensor with an OBD scanner? See if the values seem reasonable or are just completely off?

Thanks for the input. With your Volvo, did the bad readings cause similar symptoms, like the AC not working? Also, were there any specific diagnostic codes related to your problem?

Yeah, the AC was definitely a no-go! The code I was getting pointed towards a faulty sensor but after a lot of messing around, it turned out to be the AC control unit itself. I'm no mechanic, so I ended up taking it to a shop. It's probably best you get yours checked out too. Could be a simple fix but it could also be something more complicated.

I appreciate you sharing your Volvo experience. Based on your advice, I had it professionally diagnosed. The problem was indeed a faulty AC control unit, and the repair cost 980€.