Valiant F22 low pressure problem?
Afer a day out, i came home to have a shower only to find cold water coming out. I checked the bolier and had F22 low pressure warning. I have reset the boiler however it only regains to 0.5 bar. Any idea how i can increase in the pressure in the system?
I have not changed anything in the house. The boilier is about 1.5 years old.
Rhys, June 2010