One of my TRVs has started making a tapping/banging sound. I removed the
thermostat part and checked the pin on the valve. It moves OK on pressing
down there is a single tap/bang sound. On releasing there is no noise. Is
there a fix for this?
thanks.

-- 
J.P. Kerslake B.Sc., F.B.I.S. Dyslexia Rules KO. Mobile 07854 815 450,
"phone" 01248-353264. e-mail Home=johnpercyNOSPAM@kerslakej2.freeserve.co.uk,
(remove NOSPAM) Riscstation Lite+. Risc OS 4.03 boot 1.03. Messenger Pro.