Has my hot water cylinder coil broke?

[ShaunCorbs]

Right don’t fill the heating system up remove the flexi link

open the cold water to the cylinder and vent eg fill it up

does the heating system pressure rise

 

[Dave18183]

Ive then after above, refilled the cyclinder/tank fully with the filling loop valve (to the central heating) closed. Boiler gauge was at 0.2bar.

The tank was full and I left it for a couple of hours. Boiler i.e. central heating pressure is now just short of 1.8 bar

How can the CH / boiler pressure increase with the filling loop valve closed? Other than filling slowly through a coil breach?

Ive just opened the filling loop just now and there was no inrush of water at all.

ive turned the heating and hot water back on now for the first time all day

 

[ShaunCorbs]

Remove one side of the filling loop is there water coming out ?

 

[Dave18183]

Remove one side of the filling loop is there water coming out ?

So with DHW tank and CH seemingly fully filled now, remove the loop a the blue circle with the filling loop valve closed (as in the picture).

 

[ShaunCorbs]

Correct right nut on the flexi remove slowly encase there’s water there

 

[Dave18183]

Correct right nut on the flexi remove slowly encase there’s water there

Ok. Done. No drips or flow

turned the HW and CH off before I did it

 

[ShaunCorbs]

Is the water back onto the cylinder?

 

[Dave18183]

Is the water back onto the cylinder?

Yes fully open. Here is what you see. And the cold water isolation fully open (spindle extended) at the back

 

[ShaunCorbs]

Then yes I would concur that your hot water cylinder has failed somewhere

 

[Dave18183]

Then yes I would concur that your hot water cylinder has failed somewhere

Ok thankyou. For my understanding. Can you help me understand how what I did helped you determine this? On it own or with something else I have done this far. Thanks