worcester 24i water problem

[scotweb]

hello please can anyone help me ive got a worcester 24i and its been a great boiler but it seems to have developed some sort of fault. The problem is the hot water, the central heating is red hot and seems fine, the tap water on the other hand isnt very hot and the shower only seems to get hot when i turn a tap on or flush the toilet reducing the pressure, i know its winter and the incoming water is very cold but it never used to be like this please can anyone help.

many many thanks
dave

 

[ChrisR]

Exactly which 24i - any other letters or words?
Are you in a hard water area?
Does the boiler go on off on off when you draw HW, making it go hot and cold?

 

[scotweb]

hi chris its a 24i fsn, model/version aph, im in a very soft water area and the flame is constant when the tap/shower is on, its as if ive got to have the shower or tap barely running to get hot water, its as if the burners are not preforming but thet seem to have nice blue flames?