While you wait for answers, we may have found some information which could help you.
Click here for Vessel Charge Pressure
Jaguar boiler F1 code?
why does my boiler keeps cutting out and how do i get air out x?
Pilot light?
what does fault F1 ?
jaguar 23kw wall hung combination boiler?
Explosive ignition on a Jaguar 24 ktv?
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix home heating systems.