by philipstretton »
Mon Oct 14, 2019 8:41 pm
i have two reliance underfloor heating heating pack and manifolds with a warmus high limit stat , the heating runs ok but after a time the high limit stat operates and switches off the pump on both manifolds it would seem that the thermoguard uhf valve on each is not controlling the temp . this seem unlikely on both manifold ,any idea on what could cause this
