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halstead ace high ( combi)?

does not get very hot on hot water unless taps turned very low have checked dhw heat exchanger no leaks clean and clear sometimes ignition lockout 4 timrs
john, March 2009
replace the dhw heat exchanger. i am a service agent for halstead and have had this fault quite a bit.

boiler bill, March 2009
link Click here to see other fixes for Halstead Ace High.