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underfloor heating pump overheating

BigGeorge · 2017-11-26 21:41:53

have a wavin underfloor heating manifold with a grunfos pump (ups 25-60 130) the controller pump for the loop. The pump is tripping out on high temp ( there is temp sensor right beside it) , I cant feel the pump vibrating when it is 'running' & it just gets really hot. There appears to be no flow through the manifold…

26-11-2017 9:41pm

#1

BigGeorge

Registered Users, Registered Users 2 Posts: 473 ✭✭

Join Date: October 2008

Posts: 319

have a wavin underfloor heating manifold with a grunfos pump (ups 25-60 130) the controller pump for the loop.

The pump is tripping out on high temp ( there is temp sensor right beside it) , I cant feel the pump vibrating when it is 'running' & it just gets really hot. There appears to be no flow through the manifold although the pump is getting hotter & supposedly running
There are inlet & outlet valves which turn freely & a TRV on the way in too ( not sure how to test is this working)

There are 2 other identical units right nearby with no valves between them in the house & they work perfectly - don't think the problem is on the system side, more likely on the loop / manifold

Any advice appreciated

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