Did you get anywhere with this Martin? I have the same symptoms and have ordered a new evaporation temperature sensor, but now need to work out how to get to it to replace it. I followed Gemini's advice on terms of diagnosis (probably my guest mistake!) and it all seemed straightforward to do. I had no fault codes etc, so ordered the sensor and then queried how to get to the old one. ChatGPT and Gemini then fell out about how to do it! One saying it was a nightmare, the other saying it was a piece of cake! I believe it's accessed through removal of the drivers side foot well dashboard covers but haven't had time to look physically yet. Any advice or progress you might have made would be much appreciated. Many thanks Neil