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Vitola Biferral

I had to replace the grounding electrode on a VB2-33 that we installed 11 years ago.  This boiler has been flawless except to this one problem and I'm wondering what could have caused it to deform.  Any ideas?
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  • Robert O'BrienRobert O'Brien Member Posts: 2,939
    Chassis burner?

    Not that familiar with chassis burner but Vitodens flame rods warp a fair amount over time
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