underfloor heating not working upstairs

[maria_oichen]

Underfloor heating not working upstairs, it's fine downstairs.
-pressure gauges stay at 40
-pump working
-tried restarting by pressing button on limit thermostat, but it still doesn't work

any ideas to what the problem is?

 

[Norcs]

Surprised the Honeywell failed and not one of the danfoss.

 

[Sparkgap]

Thanks guys! I thinks it is a faulty motorised valve if I keep it on menual, heat going through. As soon as I turn it back to auto the heat stop. Will order one it's was a Honeywell one.

As I said, check if it's getting a supply first or you could end up changing it and still not working.