I also repaired the heater resitand now the ventilation works good again.
Before i could only use the full option. It made a lot of noise in the car and when i shut it down there was no air coming in so within a few mininits i got steamed windows. It was a simple job to do once you know how things work and where to find them.
There was a lot of dirt in the ventilation system. I cleaned it al up.