Vaillant ecotecplus 824 F22 wont re-pressurise

[RMS786]

Hello Forum members,

i am trying to establish why the boiler won't re-pressurise when letting water in through the filling loop.

I suspect the boiler has not been used for a good year or two.

Bleeding the radiators downstairs lets some water out but upstairs rads do not appear to have any water.

Power cycling the boiler just throws F22 code again.

I removed the boiler cover and found signs of leak at the lowest point in boiler enclosure around the inlet connections.

Also, the small analog guage under the expansion vessel is reading zero.


Any help will be massively appreciated. Attaching photos.

Thanks

 

[cross thread]

Have you opened both valves on the end of the silver flex ( flat blade screwdriver)
Your boiler needs looking at as it looks in poor order and you should not remove the case as it’s a safety seal.

 

[RMS786]

Thank you for response CT. Yes, i have used flat head sceewdriver to open both ends up complteley (as in align the slot with the pipe layout). I notice, the right hand end of flexi appears to have an additional fitting in-line with the valve, is that a non return valve? Do i need to do anything to it?

The mains pressure is pretty decent, so i have taken that out of the equation. Display shows 0.4 bar pressure.

Wondering if there is a blockage in the copper pipework? If so, is there a service program that help in this case, purge for example? Would drainung the system at the lowest point help?

Thanks

 

[Stuckinarut]

Sounds more like the filling loop has failed or you've not opened the correct one.

 

[RMS786]

In picture 4 above, i have opened the inlets attached either end of the flexi pipe using a flat head screwdriver so that the slot aligns with the pipe's orientation (slot is in-line with the pipes and not across)). Not sure, if there is a way to test the filling loop without unravelling a number of connections?

Also, could there be air/sludge trapped inside the boiler pipework preventing the floor of water? Trying to keep investigation as non-destructive as it can be :~)

Thanks for you respone.

 

[Stuckinarut]

With the isolation valves closed, You could undo one of the nuts to it, open the valve and see if water flows out of the valves in question, and in turn do the other one