Vectra's Multiple Warning Lights: AC System Link Found?

Hi there! I've got some experience with cars, nothing too fancy but I've dealt with similar issues on my 2000 Vauxhall Astra (also had an Omega before). Funny enough, I had almost identical symptoms, dashboard going crazy with electrical warnings. Turned out it was a cold shut-off valve that went bad. Luckily, my cousin's a mechanic and fixed it for free as a favor. The part itself wasn't expensive, but the labor could've been pricey at a regular shop. But before jumping to conclusions, how long has this been happening? Does it happen when the car's cold or after it's warmed up? Any other unusual behavior from the AC? This info would help narrow down if you're dealing with the same issue I had. Hope this helps! Let me know if you need more details.

Hey, thanks for the detailed response! Mine's been regularly serviced and only has 39969 KM on the clock, so this issue caught me off guard. It started happening about a week ago, mostly when the engine's still cold. The AC's been making a weird clicking sound just before the warnings pop up. Your experience with the cold shut-off valve sounds pretty similar to what I'm dealing with. Did you notice any clicking sounds before your dashboard went haywire? I'm thinking of getting it checked out before it gets worse. Thanks for the help!

Hey again! Yeah, now that you mention the clicking sound, that's exactly what happened with mine! It started with that annoying clicking noise coming from the AC area, especially during cold starts. It's like déjà vu hearing your description, it's pretty much identical to what I experienced. In my case, the clicking got more frequent over about two weeks before the dashboard completely lost it. The cold shut-off valve was definitely the culprit. When my cousin replaced it, he showed me the old one and it was pretty worn out. The clicking was basically the valve trying (and failing) to do its job properly. Since your Vectra's got such low mileage, I'm a bit surprised it's acting up like this. But these things can happen regardless of mileage, sometimes it's just bad luck with parts. My Astra had about 60000 KM when it happened to me. Quick tip: if you're taking it to a mechanic, mention the clicking sound and the cold start symptoms, it'll help them diagnose it faster. My cousin said these symptoms are pretty typical for a failing cold shut-off valve in these models. Keep us posted on what you find out! Curious to know if it's the same issue as mine.

Thanks so much for all the helpful information! You've actually made me feel a lot better about this whole situation. The clicking sound being the same as what you experienced is quite reassuring, at least now I have a good idea of what I'm dealing with. I've just booked it in at my local garage for tomorrow morning. I'll definitely mention the cold shut-off valve and all the symptoms we've discussed. Fingers crossed it's a straightforward fix like yours was! I'll keep you updated once I get the diagnosis. Really appreciate you taking the time to share your experience, it's been super helpful! Thanks again!