After a bit of advice from those tat may have experienced it.

Got an A4 B5 Tdi with climate control.

Over the last few months my climate control has gone a bit wonky. The first thing that i couldn't figure out was occasionally the A/C would come on, and i'd press the button, and it wouldn't switch off.

Then the temp buttons started following suit...i'd turn it up at the beginning of a cold winter commute, and as i got comfortable, i couldn't turn the temp down. The following day all the buttons would work and no problems, a few days later same problems...wierd? The on/off issue of the problem has negated the actual buttons being faulty as they do work, just generally not when i want them too!

The result of this is now the temp is stuck on 'Hi' and i can't turn it down. Has been like this for about two weeks. Not a problem immediately, but as it get milder its going to be a problem.

All the directional air buttons work perfectly, as the does the 'de-mist' function.

I have been looking on FleaBay for replacement units, but am not convinced this is the problem. Could it be a busted sensor or something?

Advice and similar experiences would be most welcome.

Thanks