Our Glow worm compact electronic boiler keeps cutting out with an increasing frequency. We had a similar problem a year ago and had it looked at by a Corgi/gas safe engineer who essentially repressurized the system. He commented that the floor was damp below the boiler and considered a leak, but at a follow-up visit (service) stated all was okay. Over the last 2 weeks, the boiler has cut out approximately 11-12 times, usually in the morning. We have noticed that the water out of the hot water tap is excessively hot just before and after the boiler cuts out. The boiler makes a slightly unusaul whirring noise when the red light flicks on. Current pressure approx 0.7bar. Should I just re-pressurise or is there a more sinister problem? Many thanks.