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- 25 Nov 2005
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Each time our timer turns the boiler off we then get a loud banging sound from the pipes after the pump turns off after it has run on for a while. I guess the noise is boiling water in the boiler because the water temp doesn't drop fast enough. Any ideas? Faulty pump? Have just had the thermostat changed on the boiler and that seems to make little difference. Both water and radiators running very hot.