Hello , I have not found anything on the topic! So the following problem…. I get into my car 5°C in the morning it is outside, turn on the heating (Climatronic ) without Eco operation, after a while the ventilation goes on because the motor has to heat up for the first time 😉 So far so good ,temparaturschalter stands at 20° or 21° and the heating blows warm air. After a while so about 20 min the ventilation only leaves cold , whether Eco or not with Eco operation. Does anyone have an idea? Thanks for an answer! Gruss PS: It is an Omega 2,6 V6 Facelift Bj 2001