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Jerry, Plumber
Category: Plumbing
Satisfied Customers: 760
Experience:  Residential journeyman plumber, over 20 years experience.
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Worcester Bosch combi keeps making loud rumbling intermittently

Customer Question

Worcester Bosch combi keeps making loud rumbling intermittently sometimes when hot water is turned on but sometimes not. Had plumber who put it in 5 years ago round but the boiler didnt make any noise when he was here of course but he couldnt find anything wrong.
Any ideas?
Submitted: 2 years ago.
Category: Plumbing
Expert:  Andrew Smith replied 2 years ago.
We need to try and narrow it done if we can.
Is it only when the boiler is running?
Is it only when the burner is firing?