In message .uk, Ed
Sirett writes
On Mon, 08 Dec 2003 21:03:34 +0000, geoff wrote:

In message , David W.E.
Roberts writes

Can anyone detect anything screamingly obvious that I have neglected to
do?

Pump is definitely working by the way.

Jules

Have you bled the pump?
Should be a big (plastic?) screw you loosen to let water out.
Air in the pump can prevent water circulating.

I hope you're not on about the big chrome screw at the back of the pump.

This is not a bleed screw.

OK it's an access cover but it serves to let any air that's in the pump
out.

Not if it's mounted horizontally Ed (as in my boiler). Both motor
bearings are between the water and the screw cover.
--
geoff