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well, I havent rung Keston yet, It is a wise idea. I did try turning the secondary pump (grunfos stylee thing in airing cupboard) to second speed setting (was at level 3 so turned to level 2) . I watched like a hawk for overheating etc, and the boiler seems happy now - rads heat up etc...

Chris, Thats a great idea. Sadly this unix workstation is at work, and my home pc is b*ggered. I will see what I can work out... I tried turning all the rads down by a couple of notches last night to no avail. The only other syptom I can descibe is that the boiler goes through its...

Chris, Hadnt thought to check if heating / hot water / both. Will check this eve. By-pass... Dunno? - Airing cupboard is full of pipes/3 way motor valves/red valve handles and all sorts of scarey things - will try and see if I can fathom that out too... Min flow - yep, will always watch...

Hi Chris, I am getting my fault from Page 22 Section 5, last 2 sentences. Light flashes very quick - i.e. not 1 time a second, So I ration it is about 5 Hz (10 times in 2 secs) Light Status: No diag lights on, Mains (green) light on, and red 'water flow' light flashing at 5Hz PAge...

RECENTLY I NOTICED THE RED LED FLASHING AT 5HZ ON MY KESTON CELCIUS 25 BOILER. READING THE MANUAL IT SUGGESTS THE BOILER CANNOT LIMIT SYSTEM WATER FLOW ENOUGH ITSELF AND THAT 'CONSIDERATION SHOULD BE GIVEN TO REGULATING THE VANVES ON THE SYSTEM TO RESTRICT SYSTEM FLOW RATES' NOW THIS...