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Recently I have noticed that when my CH or HW switches off, occasionally the water pump continues going, which gets rather noisy after a while. It happens about once or twice a week. So not everytime the system stops. If I turn up one of the thermostats (CH or HW), wait for the...

Hello, Over the last few weeks I have noticed an odd gurgling, fizzing, shooshing noise comming from what seems to be inside my hot water cylinder tank. I'd describe it as the noise of a small wave receding on a pebble beach. The central heating system is working perfectly, but the noise...

Hi all, I have a problem with my central heating system and would be grateful if anyone could tell me what might cause it. Let me describe the problem and my system in as much detail as I can. Basically when I turn on my central heating the motorized valve opens and the pump starts...