Problem 1 – the Schrader valve on the expansion tank leaks so the system depressurises. I tried to re-tighten/replace the valve core but it wouldn’t move. I’ve put a temporary fix in by attching an extension motorcycle Schrader valve onto the original (similar to http://www.weldtite.co.uk/detail.asp?ProductID=166&navID=4) but wonder if anyone can suggest a better fix that doesn’t mean taking the boiler apart (as I’m not Corgi reg). Thanks to all who posted on re-pressurising combis as that helped loads in diagnosing the problem.
Problem 2 – Sometimes there’s no hot water (or sometimes it’s hot and then goes cold) tho the central heating appears to be fine. When this problem occurs the ‘fault on fan or flue’ light flashes. Sometimes leaving it alone cures the problem, sometimes switching the boiler off and on cures the problem and other times the thing works fine all day! The fan appears to be ok (ie spins on direct connection to the mains). The flue isn’t blocked. Any ideas?
Thanks in anticipation,
Mike
Problem 2 – Sometimes there’s no hot water (or sometimes it’s hot and then goes cold) tho the central heating appears to be fine. When this problem occurs the ‘fault on fan or flue’ light flashes. Sometimes leaving it alone cures the problem, sometimes switching the boiler off and on cures the problem and other times the thing works fine all day! The fan appears to be ok (ie spins on direct connection to the mains). The flue isn’t blocked. Any ideas?
Thanks in anticipation,
Mike