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I'm not dealing with the Installer, as the boiler was put in a number of years ago (I assume) and I just bought the house. Instead I'm using my trusty plumber, who is Corgi registered and a thoroughly competent and nice bloke. There is no dispute at all between him (or me) and Glowworm, he has...

I have a Glowworm 30CXI combi condensing boiler installed in the house I recently purchased. Unfortunately it doesn't produce constant hot water, but instead pulses hot, cold, hot, cold. This is the same when using a single tap or multiple taps. Each pulse or cycle is about 20 to 30 seconds...