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[/url] it's set 3 and half out of 6, i've tried turning it down, it just takes longer but still bubble it's a baxi and is no oolder than 5 years, the system itself is was installed 20 years ago. I don't know about the primary flow, how do i find out? the boiler itself is suituated...

the water is heated by a coil inside the hot water tank. the thermostat is a honeywell L641, and is an exact replacement for the one that was already fitted so I connected the wiring exactly the same as the previous ( how do I know that the previous one was wired correctly I hear you ask...

Please help, my hot water doesn't cut out properly. When switched on and the temp on the thermostat is set at 55c it doesn't switch off, it keeps going till a loud bubbling/banging noise comes from the coldwater tank above, and then it switches off. I've tried changing the thermostat for a new...