Skoda Yeti Diesel air conditioning and error messages

Sounds familiar! I had a similar issue with my old Renault Megane. The air conditioning system wouldn't kick on, and the dashboard lit up. Check the temperature sensor on your heat exchanger. If that sensor is kaput, it can mess with the whole cooling system and the HVAC system. Is the engine cooling working correctly?

Interesting. Where exactly is this temperature sensor located? And how did you figure out it was the sensor and not something else, like the air conditioning control unit itself?

Yep, sounds like the temperature sensor. Think of it like a thermostat in your house. If it's not reading the temperature correctly, the whole system goes haywire. In my case, the sensor calibration was off. The shop confirmed it with their diagnostic tools. They were initially thinking it was the air conditioning control unit too, but the sensor was the cheaper fix and thankfully did the trick. I'd recommend getting it checked out by a professional. Good luck!

Big thanks for the help! Took it to the shop, and you nailed it. Temperature sensor on the heat exchanger was toast. Ended up costing me 980€, ouch, but at least the engine cooling and HVAC system are back in action. No more error messages!