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steve - many thanks, useful info, will try that to see if the diverter is working. tony, apologies i didn't expect you to relate me to the call. chris - i think you might be onto something, is there ay way to confirm a pcb fault? as when the hw is on and the ch comes on it does send some...

Hi all, thanks for responses so far. I read these forums before posting so all taps checked - no leaks, and i also bled all radiators (not much air came out). checked pressure of boiler also. Agile, I spoke to you on the phone! What didn't you understand? HW works fine. When the...

Hi, HW is ok, CH won't start. Otherwise boiler is working ok. Serviced 2 months back. Suspect a possible diverter valve issue but want to run past some experts. With the HW off, when the CH comes on the boiler does not fire up at all. And with the the HW on, once the CH comes on...

this turned out to be a gas valve adjustment issue and when the boiler was on low, once this was adjusted (not enough gas coming through) the issue went away and it is functioning ok. not before numerous parts replaced!

I know it's not the best boiler but it came with the property and is only 5 years old and has never before had any issues until it was 'serviced'. it had a 13a fuse in there, so replaced like for like. i checked the manual and looks like you are right - 3A! everything works and it heats...

Yes, I topped it up a little to ensure the needle moved and it did :) the boiler fuse blew yesterday, not sure if it is related to this or not, which I replaced with another 13A fuse. Still giving the vibration noises and negotiating with the people who serviced it to get them back round to...

I will need to call them back in, thanks for your help.

Hi There, good suggestion, but yes I did check the pressure and it was still at 1.5, it didn't change... I spoke to keston today who suggested the following: - there mau be air inside the boiler? autoairvent sticking? problem with water (flow?) pressure? blockage behind diaphram...

Boiler recently serviced, has never had any issues. 5 years old. With hot water tank. Have recently bled all radiators. It comes on three times during the day for 30 mins each. temperature setting on boiler is half way. Since the last service it sparks up fine but makes these terrible...