F22 comes up and I have to keep topping up the filling loop any ideas ?

Clive mitchell, January 2016

First thing to do is tell us the make and model and confirm you are talking about a boiler. How's that for starters?

You could even do a search FOR YOURSELF, for "make" "model" "F22", and see if anyone else has similar problems. You never know, you may even find a solution without someone else doing it for you.

XXX, January 2016