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Apparently valve not working, how can I check it?

Radiator nor warming up whatever setting. There is no air lock.

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Sounds as though the thermostatic radiator valve is stuck although the valve settings can be set to max. sometimes hitting the side of the valve will free the stuck spindle & get it working again.

If not a drain down of the system & a new valve fitted



Posted on Dec 15, 2008

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Try removing one of the faucets and letting the water flow freely
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Hi. Although our taps and shower are working fine, we have just noticed that the toilet tank will not refill after a flush. I have tried filling it manually and it flushed okay though not using the whole...

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Sep 17, 2011 | Plumbing

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I have a one handle shower/tub faucet, and when you run straight hot water (to preheat for example) the water shuts itself off. Lever is still in the lifted/on position however. Cold is fine, even warm...

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The problem is probably in the floating valve that is located under the spout. This valve floats up and into the base of the faucet when you push the handle on the sprayer to use it. This redirects the water to the sprayer.
They get stuck and then don't close off the spout properly
Short of teraring the faucet clean apart they are almost impossible to fix. Turning the water off and disconnecting the supply hoses, then blowing air back through the faucet spout may dislodge whatever is in there. This has worked for me in the past... and it has not work also...
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Jan 09, 2009 | Samyang Phoenix Faucet Shower Valve

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sounds like the expansion tank does not have enough air for exp in system ,shut off the boiler let cool for 2 hours , drain at least 1 gal of water out of expansion tank ,careful don't get burned ,then open cold water inlet valve , let system take all it will ,should be able to hear quit hissing when filled , let warm again and bleed the rad as close to the end of line as possible , bleed until you sure no more air , if this does not fix repeat process . should take care of problem, only cause 2 little air ,too much air ,circulator pump

Dec 08, 2008 | Plumbing

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