Thanks very much Iain,,, you saved me a few quid there, I appreciate it
terry
October 2008
if its the one facing you bottom left its a very common niggle but its a diaphragm, service kit you need only a few quid from parts center, you get diaphragm brass nut and washer and o-ring.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix home heating systems.