Underfloor Heating Slowly Heating on 2 Zones
Posted: 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