Hi

I have the above boiler & all is working well apart from no hot water , ch is working fine - plumber came round this morning had a quick look & said , mmmmm you better get someone that knows about gravity systems .... Now im lost as i have no idea where to turn next

Any ideas

Thanks
Davie

David Stevenson, October 2005

waggled my ball valve and restored flow to tank!
Worked a treat.
Many Thanks

David Ede, May 2010

check the ball valve to the feed and expansion tank probably stuck up so lack of water to the primary circuit. just wagglr it to restore flow to tank should be problem solved

Gerry Rood, February 2006

Plumber was out today for 3 hours , cut the pipes under the boiler & cleaned them out , still no hot water ??

any other ideas chaps ?

David Stevenson, October 2005

Thanks for your help , Called a Plumber out today & like you said it looks like an air block ,so he is (fingers crossed) fixing it now as we speak ..

Thanks Again

David

David Stevenson, October 2005

Only a guess IF your hot water tank is hot then it may be an airlock. connect hot and cold taps with a hose and force cold up the pipes.
If the tank is cold then it could be anything so afraid it's a Corgi registered plumber you will require who will be more familiar with this system.
However are you in a bungalow with the hot water tank on groundfloor and not in loft? if so it may be the circulation pump has packed up or is blocked with silt and the water can't get past or does so slow iwhich means a replacement pump. Usually a Grundfoss. They are easy enough to change with the cut off valves each side of the pump. if you do change it then note down the terminal wire positions in the pump. Turn off the boiler shut the two valves Two wreches and undo the pump nuts note which way around the pump goes. Grundfoss pumps around £38 a guess. Good luck if you do it...... If the water has a strong flow forget the pump call an engineer Corgi registered a central heating engineer would as the plumber said, be more familiar with the system and know what the fault is before seeing the system . bob

Bob, October 2005

1st thing to check is that the expansion tank is full

d.., October 2005