Hi,
I have a Vaillant ecotec plus 624 sealed fan assisted boiler.
Just the other day it stopped working and now flashes up 0.2 bar, f22. I've looked in the owners manuel and this fault is dry fire. Too little water in appliance, water pressure sensor defective, cable to pump or water sensor defective, pump blocked or defective pump output too low.

I've tried bleeding all radiators and have opened both the c.h. flow and c.h. return valves under the boiler but have had no joy.
Please has anyone any further advice?
Thanks.

daz., March 2013

i fitted a new control knob ion my 24i
now it is making an awful noise and the heating has stopped working.
what did i do wrong?

maryconnelly, March 2013

No need to answer my question.
My neighbour has the same system and told me how to sort it.
The braided filler loop was in a different cobourd to the boiler. A quick turn of the tap on the filler loop and the preasure was soon up to 1.8 bar. Now my radiators are the hottest they have ever been.

Daz., March 2013