I have a Glow worm Energy saver 40 boiler and I had it running this summer for the hot water only. A few times I noticed that water came a bit cold from the taps but the boiler still worked. I turned on the heating to check and it took a while to start but it worked. The boiler now does not turn on at all either for hot water or heating. It looked as it has slowly died. I have tried the reset button but unsuccessfuly. Is there anything I can check before I call the technician?
