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- 12 Feb 2009
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I have a condensing boiler operating both the central heating and the hot water. The hot water is stored in a hot water tank fed from a header tank and the central heating is a sealed system {I think} with a smaller header tank. The boiler will not fire up to only supply central heating. In order to get the heating on we have to run enough hot water out of the tank to convince the boiler to fire up. Bizarrely this also starts the circulation pump and the radiators heat up. As soon as the water in the hot water tank reaches the correct temperature the boiler shuts down and the central heating stops supplying heat to the radiators. I have adjusted the thermostat and have both the hot water and central heating permanently on -- all to no avail. As a possible additional pointer the radiators downstairs heat from the top down so the top is hot and the bottom is cold -- I know this sounds crazy but it is true.
Does anyone have any ideas? please
Does anyone have any ideas? please