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wordester combi 24cdi?

the boiler switches on but after 30 seconds the "tap"icon flashes red and we can not get heating or hot water.
mick, January 2009
You have an air pressure fault. If you dont hear the fan run before the fault occurs, you may need a new fan or its poss its the Control Board, could also be air pressure switch. Alot of these 24cdi's have the old fans fitted in them which are unreliable.
If fans running and pilot ignites before fault, you may have a flue blockage.

Jeff, January 2009