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Shudder through piping system when boiler comes on first thing in morning, ?

We have a 3 yr old Glow Worm 30hxi boiler which is serviced by Glow Worm and appears to be be A1. No problem with heating or water. However, for some time now we hear a loud shudder through the piping system when it starts up, and on occasion through the day when it turns itself off. Our installation engineer has no idea what is causing it. We have bled all radiators. We are willing to send a cheque to any person who can offer a solution. Many thanks

Captain John Mitchell
January 2010
Glow WormGlow Worm 30hxiHeating, Home Heating SystemsBoiler Heating Radiators
if its pipes makeing knocking sounds on start up it could be the pipes under the floor boards not being cut into the joists deep enough

skippy
January 2010

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Glow Worm 30hxi Boiler Shuddering - Help!