Hi all, long time no speak....
I have kept my Gas safety licence up but for the last 2 years have been concentrating on Power flushing, so am a bit out of the loop on boiler repairs.
My stepson phoned me up the other day and said his hot water was going hot and cold......
So today i picked up a DHW diaphragm kit thinking that was the problem...
When i got there and took the old diaphragm out it was intact, albeit a bit gunked up, so i changed it...
Fired the hot water up and the boiler tryed to fire a couple times then failed.
Reset it and tryed the hotwater again and it came on......but after a few seconds the boiler shut down, then a few seconds later fired up again..
Checked the min gas pressure and it was 10.2, spot on......
Fired the hot water again and the same thing...it fired ran for a while then shut off, then fired again.....
It looks to me like everytime the flame should be modulating it shuts down and then fires again....
During the few hours i was there it did flame failure a couple of times...
Because my head is a bit rusty on repairs i am not sure if its the gas valve not modulating or something else...
Any advise would be very gratefully recieved...
Many thanks...
Its a Main 24 HE
I have kept my Gas safety licence up but for the last 2 years have been concentrating on Power flushing, so am a bit out of the loop on boiler repairs.
My stepson phoned me up the other day and said his hot water was going hot and cold......
So today i picked up a DHW diaphragm kit thinking that was the problem...
When i got there and took the old diaphragm out it was intact, albeit a bit gunked up, so i changed it...
Fired the hot water up and the boiler tryed to fire a couple times then failed.
Reset it and tryed the hotwater again and it came on......but after a few seconds the boiler shut down, then a few seconds later fired up again..
Checked the min gas pressure and it was 10.2, spot on......
Fired the hot water again and the same thing...it fired ran for a while then shut off, then fired again.....
It looks to me like everytime the flame should be modulating it shuts down and then fires again....
During the few hours i was there it did flame failure a couple of times...
Because my head is a bit rusty on repairs i am not sure if its the gas valve not modulating or something else...
Any advise would be very gratefully recieved...
Many thanks...
Its a Main 24 HE