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- 29 Apr 2020
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Recently my heating system has started a dull consistent thudding/ knocking noise, sounds and feels like it’s coming from unvented cylinder cupboard, possibly water combination valve - I can feel vibration when holding the valve.
Happens regularly throughout day and night but At night this dull thudding is very annoying. It only does this when taps are off and no water running.
I have tried bleeding the rads and draining the whole system.
Any advice please?
Happens regularly throughout day and night but At night this dull thudding is very annoying. It only does this when taps are off and no water running.
I have tried bleeding the rads and draining the whole system.
Any advice please?