how do i increase the pressure on my heatslave?

my heatslave 20/25 will not spark to ignight boiler?

heatslave 18/25 not firing oil?

Heatslave 15/19 boiler - keeps kicking in?

My heatslave oil combi boiler keeps locking out?

Heatslave 15 19 burner not igniting on hot water demand?

Heatslave pump keeps running when not selected?

w/b heatslave 20/25?

heatslave 20/25 boiler not working and the reset button is not lit up. ?

Boiler?

heatslave 9.24 no pressure following leak?

expansion vessel is full of water and the boiler is locked out ?

Expansion vessel full of hot water?