On Thu, 3 Dec 2009 01:29:16 -0000, "Ben Short"
wrote:

Well the plumber hasn't come yet to see to the rad I cannot bleed. However,
I left the heating on today for 3 hours and only in the last hour did the
rads get warm/hot. 2 of them are still stone cold the others warm to hot.
But so long to get warm. Could it be the pump at fault here? Thanks
I've had a situation where the bleed valve hole was blocked from
inside, I think a manufacturing fault. A poke with a thin (jewelers)
screwdriver sorted it, but be sure to have a cloth and the bleed screw
close by and get it in quickly - I didn't, so had to keep my thumb
over the hole (and hot water) while yelling for the Mrs to come in
from the bottom of the garden and find the screw for me! Lesson
learned.