DIY Doctor

Underfloor Heating Slowly Heating on 2 Zones

Postby Stavros4113 » Tue Dec 17, 2019 10:17 am

My grunfos pump connected to my underfloor heating system has power coming from the heatmiser control panel and the 5 zones are heating but 2 more slowly than the others have now noticed that the green indicator lights on the pump are not showing my question can the underfloor heating work without the pump running
Stavros4113
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