Jamie Collis
Either electrode leads ( 2 thick red wires from pcb to ignition electrodes) - this job about £70 inc materials Or Bearing plate above fan - this job about £90 inc materials Or more than likely, it’s never had a real decent service and baffles are full and over heating. If left the baffles buckle and the boiler will need a new heat exchanger - this job about £500-£600 inc materials. Post a job, interested people will get in touch