Recent content by macketty

Thanks to all, in particular Karl for all your help. Got the job done today and hey presto: No thump! Had a look at the old valve - couldn't see a thing wrong. Obviously it must have worn in the last 19 years and I suppose the tolerances are such that imperceptible (to an oaf like me)...

Thanks for all your help Karl. I'll give it a go tomorrow. Mac.

Follow that, Karl. I was worried I was needing another new motorised head, but from what you're saying I should have replace both parts last year rather than just the motorised head - or have I knackered the head now I wonder. I only changed the head, as the motor had failed and the valve still...

Thanks Paul. Just ferreted under the floorboards and I think you're probably right. All that faffing about looking for airlocks! suupose a case of a little knowledge, etc, etc. Guess tomorrow's job is all mapped out now. Drain the system. Change the valve body. Fill-up and chase the new...

Thanks Paul. I've got a spare valve body (it was cheaper to buy a complete valve last year, rather than just the head - never did understand that!) which I'll dig out tomorrow. You sound very definite. Is this common? Mac

Gassafeman. Seems as if you're concuring with Karl? (Sorry, didn't read all of your post!) Mac

Hi Karl. Follow what you're saying. Must admit, I hadn't credited the valve with being able to generate such a noise. I'll investigate more in the morning when the system's cool and see if I can feel the thump in the valve. Presumeably, if I remove the motorised head and move it by hand, I...

JohnD. Sorry meant to include the Boiler details: Potterton Profile, about 19 years old. Seviced last year. Gassafeman. Yes, Honeywell V4073A 3 position vlave. Thanks. Mac

Thanks for the quick response. Karl. Don't think it's the valve. I replaced the head about a year ago. The noise seems to be after that in the system. The valve seems quiet. Is there any way of eliminating it though? JohnD. The noise only happens the first time the valve diverts the flow...

Hi! First post here, although I've been reading a lot of the helpful posts for some time, so I'm hopeful someone can help. Every time our central heating system turns the Hot Water on, there's a loud "thump" from the pipework which I assume is an airlock. I've bled all the radiators (even...