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right heres my thinking, i see replacing the Diaphragm being a pain in the back side and would cost about 15-20 quid, i could get a whole replacement valve for 30-35 quid, would it be easier and safer to replace the whole value?

is it easy to change when i have the part. I am fairly competent at DIY, i ve changed a CH pump at my mothers and all works fine. and is the Diaphragm found in the diverter valve?

sorted plumbing, I cant find nothing in the manual about the diaphragm, could you explain to me what it is and where i would most likely find it? thanks

the point is it wasnt working like it was suppost too (read earlier posts!)

this boiler is crazy. right just turned the CH on, lights up ok, so i turn the hot water on, still burning, then i turn the CH off and the boiler is still burning. So then i stop the DHW and the boiler goes of, I leave it for a bit then turn the DHW on again and it burns up fine. :S absolute...

anyone have any thoughts on this? (see above post) thanks

it does fire up manually when i press the switch. is a diapharm expensive and easy to replace?

right just had another read of the manual and looked at all the switches. There is one called the DHW pressure switch. upon closer inspection i seen the switch isnt being pressed by the 'paddle' (if thats what u call it'). any ideas? i presume this switch should be pressed in as the flow of the...

just so i get this right. when the hot water tap is opened and the water begins too flow through the boiler what triggers the boiler to ignite? is it the thermistor or something else. i presume the CH works the same way but the thermostat triggers the flow of the water and the thermistor...

its did when i first increased the pressure in the system, now it doesnt fire up at all for DHW still works for CH

thanks SortedPlumbing, is it safe to take the front panel off and turn on the system to check the fan?

Hi, my hot water recently went off on my above named combi boiler, I notice the pressure was below 1 bar, so I increased the pressure upto just under 1.5 bar (as instructed in the manual). I then turned on the hot water tap and the boiler fired up then cut out a second or so later. Since then...