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Viessmann Vitodens 200

Hi guys
If the boiler hasn’t been cleaned in 10 years , can co leak in boiler room in a Vitodens 200 ? Please advise
It vents through the wall with proper pitch
With pipe inside pipe


  • Gordy
    Gordy Member Posts: 9,537
    10 years?? Got pics of the cleaning?

    Is co suspect? Is there a co detector going off?
  • CBRob
    CBRob Member Posts: 273
    It does not seem like one thing would directly cause the other.
  • Paul Pollets
    Paul Pollets Member Posts: 3,649
    Unless the venting is defective, it's unlikely the boiler poses a risk. The older models do have a new vent adapter kit that retrofits and comes with the HX replacement recall. You may want to call Viessmann or your dealer for more info. Damage to the HX can occur when yearly cleaning is ignored.
  • nikos
    nikos Member Posts: 16
    Thank you Paul
  • nikos
    nikos Member Posts: 16
    A co detector going off in the apt next door when it’s windy out. !