Peugeot 807 automatic temperature control issue

I own an 807 and had similar symptoms last year. It's likely the interior temperature sensor. Have you checked the sensor's plug connection?

Thanks! Where exactly is that sensor located, and what should I look for when checking the plug?

For me, it was a faulty plug. I went to a workshop; they said it's a common issue on these cars. Probably best to have it checked out to avoid further damage. Cost me 95€.

Thanks a lot! Sounds like the easiest way to go and seems to be the same issue. Cheers!