I'm having problem with my ventilation on 2005 JTD 8v Alfa 156. When using AC (which is 100% regassed with a right amount of gas, tested 3 times for leaks (refill) in a couple of weeks), after a while, I get hot air on one side of the car, usually on the drivers side, but sometimes on passenger too. When I start the car and I set AC to say 22 degrees, it works fine for a couple of minutes, before that happens.
After that the only way I can get cold air everywhere, is to set temperature to LO. But that is annoying becouse it's too cold
Anything else will blow hot air on one side.
I have been to offical Alfa garage, where they tested the servos(replaced with new for test) and they said all of them on both sides work fine, tested (replaced for test) whole AC electronic unit in the car, and checked all temperature sensors. Everything supposed to be alright.
Is it possible that one of under the dash air flaps is stuck? But why I get cold air on LO temp if flap is stucked?