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[markiep1112]

Hi, i have the above named boiler and its starting to give me some grief,well noise actually.
The boiler works i get hot water and the radiators are fine.
But when it cuts in and out it makes a terrible noise,like a screeching noise.
Its only recently started happening,it is not the fan because i know what that sounds like because its gone wrong before on me.
I live in a block of four flats we all have our own tank in the loft fed by a main one.
Can anyone help or suggest anything? ty

[Steve the gas]

Hi,

Could be the pump - bleed it = large screw in middle.
Watch it as it comes on to localise the noise- could be sticking/air/about to sieze up.

Hth

[markiep1112]

Hi there steve, ive bled the pump it hasnt helped,but..its seems the noise is coming from the little tank in the loft,ive been told it coul dbe scale..but as i have a cast iron boiler or something they dont reccomend a cleaner

[Steve the gas]

Could be the ball valve on the F&E tank - poss, change it ...... about £5