I have an Ideal Elan boiler which is 18 years old. When the bolier comes on it makes a knocking noise then shuts off soon after. Water comes out of the expansion tank overflow - looks like a circulation problem. The pump has been changed. The last time the system was working only half the radiators would work at any time - the only way to get downstairs to work was to switch some or all of the upstairs ones off. I suspected the motorised valve but when latch it on manual I still get the problem. I seem to have had problems since a bathroom radiator was replaced (and moved slightly) earlier this year. Any ideas ?
boiler noisy then shuts off
- Thread starter billb
- Start date
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sounds like you've got a blocked cold feed pipe
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Is there an air bleed in by the HW cylinder, on the side pipes?
"Water comes out of the expansion tank overflow - looks like a circulation problem."
If you mean the vent(over the top) then yes you have. System needs a powerflush
"Water comes out of the expansion tank overflow - looks like a circulation problem."
If you mean the vent(over the top) then yes you have. System needs a powerflush
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