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If anyone can give me pointers it would be much appreciated. I've done loads of googling but yet to find any clues apart from 3 way valve. I have a 15 year old Worcester Bosch Heatslave boiler that has been working fine until recently. Hot water not an issue, but 8 times out of 10 when the...

Just installed an Alpha 2 pump and on autoadapt I experience kettling of the boiler (may need descaling) and more annoying after a few minutes a water rushing boiling sound from around the pump. The pump displays around 11watts when on autoadapt. I have an old Gloworm Fuelsave II boiler with...