Plumbing Problems in the UK? Ask a Plumber Now.
Hi F22 means low water pressure you will need to check what the water pressure on the boiler is and top it up to avout 1.2 bar. Here is a short video to show you how to refill your flexicom.
The plastic grey handles on the valves often just spin you may need to take the grey handles off and use a pair of grips to make sure the valves are turning on.
If you still have no water coming through then one or both of the filling loop valves are blocked or damaged and will need to be taken off cleaned or replaced
The pressure should start showing when the water starts flowing and the fault code clears
No sorry if you have water going through the filling loop then it will need a closer hands on look