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Please check my posting yesterday 6th feb. its under the same heading as above. Already had a reply (thanks). But any more sugestions would be appreciated. previous reply sugested flow valve shaft? does anyone have a link to this assembly in "breakdown" of the valve? Thanks.... ps...there is a...

my alpha has a manual 24 hr clock fitted to it. When the clock is in the "off" position the central heating still runs. This has just started happening. The central heating starts and stops every few seconds. Even with the CH thermostat in a low position the radiators get super hot. I think this...