C
chris wilson
hi, i've a problem with the above title. fault code is F4 and i've done everything it says in the flow chart, (cleaning injectors etc) i've even bought new spark electrodes and ionisation electrodes which i thought would of solved the problem but it didn't. here's whats happening, boiler fires up for a few moments and then slowly starts to shut down and after 20 secs or so goes completely out, fan still runs and the boiler still cycles and it does this a few times and then goes to lock out. i've tried adjusting the potenciometer (spelling) no'1 as per instructions and it makes no difference at all. is there any engineers here that can help me out. i'm an engineer myself but have hit a brick wall so to speak. thanks guys. chris.
