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Hi all, have a wet underfloor heating system. the issue i have is that some rooms/loops work fine and others the floor stays stone cold. new pump was fitted and the supply is hot so no issues there. blending valve set to 45/50 and the flows all read about 2ltrs. the returns come back luke...

also, what pressure should the system be on?

my manifold is below all the floors...

well I can close one end of the loop as it were , but wont it continue draining into the manifold etc?

HI ALL. last ditch attempt to get my UFH working in some rooms,some are fine. I want to purge the system of air which im fine to attempt. my problem is that I can close both ends of the individual loops . I have the balancing valves at one end of each loop where I can screw them down to stop the...

No carpets its wood floor

cheers, i'll go and hire a power flusher etc

Yes ,I've had it running for most of a day and still nothing.

cheers

sorry to double post, but if there is some crud blocking it, and cleaning fluid helps budge it, could the dirt/ whatever block somewhere else?

so I just introduce the cleaner thru the manifold filling point? or how do I put it through? I guess the same with the inhibitor?

what product do u think I could try to introduce my self? is it ok to leave it in the system for that long etc?

good point.. perhaps I'll just bite the bullet and get someone ELSE in! thanks for all your help and advice buddy

when I feel the floor by hand it feel stone cold. is the power flush something I can do my self , or do I need some sort of pump etc? when I purged the loop the water coming out was clear...

the thermometer on the flow shoe anything from 50-60 degress. when I have the mixer valve set to say 45 the temp guage on the return shows 30 ish at say 2 ltr /min. I know the difference should be about 8-10 degrees . the last plumber said he thinks by looking at the water in the flow gauges...

yes the flow pipe to the "cold" room is very hot, the return comes back luke warm , does get a bit hotter when I turn the mixing valve up or the crank the flow right up.. screed I believe. haven't tried to touch trace the heat.i guess I can try that later. the way the floor and pipes are layed...

What problems can the manifold have? Not actuator as I have taken them off and let the system run ..

Hi. They have worked before. How would I know if there's a blockage? When I purged that loop the flow showed 4 ltr/m . How do I know if there is some bypass as mentioned above? Room still cold even if only one on

Morning. Yes they have worked previously. As we're fine when my 1 kid slep there.

all the actuators are controlling the right rooms..if that's what you mean?