It's a Ferroli Falcon. I assume rads is radiators? If so, 4. It ignites mostly about every 3 seconds. It sometimes goes about 15-30 seconds, rarely longer.
Is is normal for a combi boiler to ignite every few seconds? We have a prepayment meter and I know that's more expensive but the central heating seems to be costing a lot of money. Just checking to see if the boiler is faulty or if that's normal?