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little update ! had a tech sales guy from swale heating over today for a quote as a backup incase i need to replace and it happened while he was here ! he thought it may be a blockage somewhere in the boiler ! any comments ? also have another guy doing some digging into cause...

Any ideas anyone !!!!! Need some idea of what's causing this so I can get someone it to fix it and the noise is getting more frequent through the night it's like a huge family of wasps are having hourly party's in the loft ! Need sleep agh !!!!

Yes all else is ok presure wise 1.5 cold and up to 2 when CH on

Thanks for clonfirming that So any ideas anyone on another cause for this I've noticed that since this noise started and I've traced it to the DHW pre heat mode that the hot water is taking longer to come through hot So I think the pre heat isn't working at all as hot water comes out...

ok another post with some more info ! boiler just started its noise 18:50 so had a quick dash to loft to look and sure enough i have the letter t on display which is hot water pre heat mode ! i then went and turned hot tap on while noise was happening and the boiler switches to d mode...

hi all in answer to above no noise on hot water and i don't think the pressure needle bounces when this happens if it helps i found this on another forum it sounds exactly what in experiencing and was posted in november 2010 begin post from other forum ............... "I...

Yes it goes into a pipe that I belive is clear Would this not cause a problem on every burn as seems the issue is only on the water pre heat burn that the boiler seems to do on it's own ?

Little more info It seems the boiler makes this noise when the the water pre heat comes on As the noise happend today with no call from the stat so I can only gues that it's when the HW preheat comes in that's where the noise occurs Also as above post today had noise and rads didn't...

Hi I belive so I think the boiler is firing and the stat connection is just another fault that's occurring ! It's just the noise it's like a very loud vibrating sound from the boiler then after about 30 secs of this the noise dies down and the boiler seems to be running ok If I then...

Hi I belive so I think the boiler is firing and the stat connection is just another fault that's occurring ! It's just the noise it's like a very loud vibrating sound from the boiler then after about 30 secs of this the noise dies down and the boiler seems to be running ok If I then...

Hi all  First time hear looking for a bit of assistance  I have a ideal isar he30 combi  Not my choice was in house when moved in  Probably about 5years old  With a draylon digistat rf3 thermostat  Problem was  Boiler failed to start before Xmas 1: had no control display and boiler...