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