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Discuss Grant Vortex Combi No CH in the Oil and Solid Fuel Forum area at

  1. SJB060685

    SJB060685 New Member

    Hi Guys. Still new to oil breakdowns. Got a Grant Vortex not giving CH. MI’s say (as far as I’ve got) the NRV could be stuck open, it says CH return will be hotter than flow if that’s the case which it is but I’m unsure exactly why that would happen. Can someone explain to me why that is?
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