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Discuss New pump electrics problem in the Central Heating Forum area at PlumbersForums.net

hello,

I have just fitted a new pump Grundfos alpha1, but it just starts for about 3 seconds and then goes dead as if it has no power.
I plugged the pump directly into the mains and it works fine so I can’t figure out what is wrong.
It is a y plan system with a nest heatlink and thermostat.

Any help would be greatly appreciated as I am pulling my hair out.

James
 

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