MikeSharp01 Posted August 29 Share Posted August 29 Just doing a check through our heating system at millstone manor, ready for winter, and have come across an odd problem. We have a radiator where the feed pipe is getting hot, there is no bypass pipe, but the radiator is not. I have had the rad off, checked it is not blocked and both valves are open, same problem. Feels like an air lock but the radiator bleeds fine. Any thoughts? Link to comment Share on other sites More sharing options...
JohnMo Posted August 29 Share Posted August 29 (edited) Where are the valves located on the radiator? Edited August 29 by JohnMo Link to comment Share on other sites More sharing options...
MikeSharp01 Posted August 29 Author Share Posted August 29 4 hours ago, JohnMo said: Where are the valves located on the radiator? At the bottom - they are tall wall rads 1.8m high. Link to comment Share on other sites More sharing options...
JohnMo Posted August 29 Share Posted August 29 Is at the end of the system, could the radiators be balanced, so the flow is be gobbled up by the rest of the system. Enough flow to feel heat in the pipe but not enough to push through the radiator. Have you tried switching off a couple of other rads, to see if it improves things? That may tell you where you need to make changes Link to comment Share on other sites More sharing options...
garrymartin Posted August 29 Share Posted August 29 Not all valves are bi-directional. Check the valve to see if it has arrows going in both directions. Also, some radiators have flow diverters so will state which side the flow should be on. Check that too. Â Â Link to comment Share on other sites More sharing options...
garrymartin Posted August 29 Share Posted August 29 Link to comment Share on other sites More sharing options...
marshian Posted August 29 Share Posted August 29 Assuming S or Y Plan - How close is that rad to the HW tank return to the boiler pipework? (is it just pipework stealing heat by convection?) Link to comment Share on other sites More sharing options...
torre Posted August 29 Share Posted August 29 Is the rad fitted with a thermostatic radiator valve? Sometimes if they've been turned off the pin inside can stick down - you can try taking the control head off so you have see the pin position - with the head off the pin should be raised and you should be able to push it down. If it's stuck down, try (gently!) pulling with some pliers to free it. Link to comment Share on other sites More sharing options...
bassanclan Posted August 29 Share Posted August 29 +1 if its a TRV valve then it's the pin thats stuck Link to comment Share on other sites More sharing options...
Pocster Posted August 29 Share Posted August 29 Maybe this ?? 🤔 Link to comment Share on other sites More sharing options...
MikeSharp01 Posted August 29 Author Share Posted August 29 Thanks all - I will get back to it at the weekend, draining it down and fitting a new 3 way valve as the current one seems to be letting by, which may explain where the flow is going when it should be going to the furthest rads, the TRV is the right way round its not stuck as I can push it down no problem so it must be an imbalance - has been working fine up until now - still best get it sorted before the winter comes. Â Â Link to comment Share on other sites More sharing options...
bassanclan Posted August 29 Share Posted August 29 To be sure it's NOT the trv try turning off all other radiators and keep the problem one on. If it gets hot then it's not the TRV Â Link to comment Share on other sites More sharing options...
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