Recent content by presston

Hi I hope someone can give me some advice. When i turn the hot tap on only cold water comes out. The boiler fan fires up but there is no ignition. I have changed the diaphragm but it wasnt perished. To get hot water i have to first turn the central heating on and then turn the hot tap on. The...

Hi guys If the d.h.w. heat exhanger was getting blocked could this cause the gurgling noise in the pump when hot water is selected and so sometimes not close the primary circuit flow switch? Thanks Mick

Hi Central heating works fine no noise from pump but when i turn hot water on it sounds like there is air in the system which i cant seem to bleed. Occasionally the hot water wont heat up at all but this is down to the primary circuit flow switch not closing the microswitch so turning the pump...

The steam is coming out of the flue on the outside of the house

Hello Found the problem to be down to the air pressure switch. The switch is ok so i presume the problem to be with the venturi. I have noticed that when the boiler first comes on a puff of steam comes out of the flue. Could it be that there is water in the venturi. Is it possible to clean...

Also when in diagnostic mode it doesnt show any faults. when the hot water is turned on the outer two leds flash alternately and when the c.h. is on the outer two flash at the same time. meanwhile the boiler is still igniting and then going out. if i leave it for awhile igniting and then going...

Hi Hope someone can help My biasi boiler has suddenly started going on and off every 10 seconds or so when the hot water is turned on and also when just the central heating is on. There are no faults indicated on the flashing led and the pressure is around 1.5 bar. I am an electrician so is...