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how to fix combi boiler?

i have a halstead ace combi boiler, heating works perfect, thermostat fine, but hot water runs hot then goes cold.
laura-jayne, April 2007
sounds like the dhw flow switch not making so the dhw flow switch body sounds faulty to me or there is a blockage in the pipes to it.

gusthegasman, April 2007
may have a faulty dhw flow switch.

hi-spec plumbing, April 2007
link Click here to see other fixes for Halstead Ace.