No flow from mains to re-pressurise combo boiler

[DaiTwp]

Hi

My boiler is working fine re. heating the hot water but as the pressure has dropped on the closed central heating circuit we have no heating.

The boiler has an external metal hose loop fitted for re-pressurisng but when I open the two valves (the double check valve with isolator on the mains side and the isolator on the central heating side) there is no flow of water.

I've disconnected the hose on the mains side and opened the valve there to see if its working and no water came out when I did this, so there seems to be a problem with the mains water flowing through this valve (the DCV with isolator). There is no problem with the mains pressure itself as the cold taps are working and its flowing into the boiler and coming out hot from the hot taps, it just doesn't seem to pass through this valve when I open it.

Any suggestions? Am I missing something obvious?

 

[swbjackson]

Valve is goosed.

 

[gigz]

Make sure the valve spindle is turning, sometimes the handle just turns .

 

[DaiTwp]

Thanks for the quick reply.

As long as I turn off the mains supply and open the taps to relieve the pressure first, is it a simple case of replacing the faulty valve like for like?

 

[oilboffin]

Yup very easy to do have a container ready to catch any water

 

[oilboffin]

don't forget to relive to pressure in your heating system first