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Can you tell me the system pressure on the gauge?
Can you take the cover off to see the pump and then take the screw out of the centre and tell me if the insides are spinning?
You need to refill the system to at least 1 bar before it will work.
Do you have a silver flexible pipe attached to the copper pipework under the boiler?
Ok, a valve one end (with no handle) and a non-return valve the other. You should only need to turn the one valve on.