Hot air from left vent

Discussion in 'D3 platform' started by djlex, Aug 31, 2012.

  1. djlex Member

    Hello guys,

    I have a problem. Hot air comes from the left driver's side vent! No matter what temperature setting I have (even Lo), the hot air still comes out. The other vents work fine and blow cold air. No errors in vag.
    Any ideea?
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  3. schiu New Member

    I had the same issue before. The refrigerant of the air con system need to be renew not regas. The reason is the coolant lost 20 percent of it's power each year. Extract all the refrigerant from the system , clean the whole air con system(flush the system ) , put in new refrigerant. All these have to be done by air con specialist.
  4. peri77 Member


    I am experiencing the same problem on my S8. The only difference is that hot air is only coming on the left driver's side vent when the driver side set temperature is close to the outside temp. If it differs more than 1-2 degrees cold air is coming. In VCDS I can see that the left vent temperature sender G150 is measuring colder air than the left side sender G151, so the controller decides to open the left side heat regulation valve N175 more often (circulating more coolant from the engine), that the right side one.

    Do you think the refill will solve my problem also ?


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