Heating not working - Valiant EcoTec Plus, leaky filter and low water pressure

[DIYNovice1979]

Hi,
My central heating stopped working, recently after the wife turned the heating on whilst the mains water was off .

The boiler displays an F22 fault code (low water pressure) and the pressure is at 0.1 bar at the moment. I've had a check and it looks like there's a leak from the Fernox filter (a Fernox TF1 Total Filter).

Is it wise to isolate the fernox filter, clean it out and then re-pressure the valiant boiler?

I've turned off the valves to the Fernox filter in the meantime.

Advice much appreciated.

Thanks,

 

[DIYNovice1979]

pics below

 

[gary plumb]

Hi the valves are not off in the photo. Looks like you have a spare washer set on the left change these then repressurise to 1 bar

 

[DIYNovice1979]

Thanks, I've taken the top off, replaced the o-ring, but it still leaked, so I've added the original and new ring - a little better, but stil a small leak.

I've found the video below and am considering replacing the unit

Although I'm not sure it's worth my effort and whether I'd be better off just paying a plumber to sort it...