underfloor heating flow meter

[happydays129]

I noticed that one of the underfloor heating flow meter red indicators (see pic attached) constantly points to (nearly) 3 L/min (see the picture attached), even when heating not in use; Other indicators will move back to zero when not being heated. I am a bit concerned. Is it shown some leaking in underfloor heating (although no visible leakage)? Or inefficient underfloor heating? Is it normal?

Please advise.

Many thanks.

 

[muggles]

Quite a big leak if it's losing 3 litres a minute, more likely to be a stuck flow meter I think, but you can test it by turning off the two isolation valves on the left of the manifold and seeing if it returns to zero

 

[happydays129]

Thank you! hope it is not leaking somewhere.I do not see any visible leakage though. Noticed that problem 5 days ago, if it's losing 3 litres a minute. I should see wet floor, right? Very nervous now. other loops shows nearly 2.5 or 3 L/min as well when heated, but goes back to zero when heating is off.