As I have no reference manuals for this boiler I can only be vague.
Something is breaking down under 'load'
As you get water for 2 minutes and heating for 8 (heating fires up at a slower rate), I would suggest the pump is failing, running too slowly.
It could also be the fan, but that would break down on hw and ch more evenly
Carefree
July 2010
Automatic Answer
We may have found other answers which could help you.
howtomendit.com for free repair help, information and advice.
