Hi,
just tried putting the heating on for the first time this year & F7.5 came up on the display. Switched boiler off then back on (turned heating off) & could get hot water from the tap, assoon as i put the heating on the fault came up again.
Anyone know what this fault code is please?

freezing cold, October 2009

I think you mean f.75, if so this is a problem with the pump and/or water presure sensor, its more than likely that the pump has seized and needs freeing up. contact an engineer or you will get wet trying it yourself

sicknote, October 2009