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Strange noise

maroo Member Posts: 29
The gas boiler in here is making a strange noise when it begins cycling it is making a loud scrape sound sort of like if you drag metal on the ground. It wasn’t doing this last winter it just started about a month ago. It doesn’t continue during the cycle it’s just one scrape sound when it begins to cycle but not each time maybe 2 times throughout the course of a day. What could it be? 


  • unclejohn
    unclejohn Member Posts: 1,757
    Do you have a vent damper?
  • maroo
    maroo Member Posts: 29
    Honestly I don’t know. I don’t even know what that is. 
    JUGHNE Member Posts: 9,831
    Back up and take a picture from the side showing all pipes coming off the top of boiler.