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No hot water intermittent

Discussion in 'Plumbing and Central Heating' started by bigfoot2, 26 Feb 2012.

  1. bigfoot2

    21 Dec 2003
    Thanks Received:
    United Kingdom
    Hi all
    I have a worcester 24 cdi rsf boiler. When turning on hot water tap the hot water light is lit but flame light is not, after a few seconds the radiator light starts flashing fast, tried reset button no change. turned off then on by mains switch and all was well the boiler fired up and gave hot water. I have looked through the manual and went through the fault finding for fail point "I" and did the resistance tests as stated and all were in the ranges stated. In the manual it states to change the circuit board, has anyone any info on this?
    because the boiler works fine, but a couple of times a day i get the above problem when there is a demand for hot water, I dont understand why the radiator light is flashing if im trying for hot water. I have checked all connections are tight and have tried for hot water while central heating is on and all is well.


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