Thanks for the reply Agile,
Though i would love to look through all the postings on this site
to find the answer to my question......
i do work full time......
and I feel that your fast response in 2 mins ( very much appreciated.)
was the faster option than trawling through them...
Just moved house and the boiler is a Vokera excell . Th vented flue fan is running constantly even when no demand is on the boiler......
is there a flow switch or something maybe sticking in the on position???
any suggestions??