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GPlumb - How will I be able to tell if the valve is wired wrong? It isn't making a noise anymore when we turn the boiler on - but then maybe the noise I associated with it has been a bad sign all along! Is there any point bleeding the pump? The pipes around it are both scalding hot right now -...

1) Potterton Suprima 40/ gas 2) Cold radiators. When you turn the heating on the boiler goes on normally for a minute and then the indicator flashes green or green and amber. The system then turns itself off (it's not the thermostat. That's working normally - clicking at the right time etc.)...