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Yes there is a nut under the teeth - what should i do with it? Should i unscrew it? Thanks again for all your help?

sorry i am being no help here whatsoever I am looking at the valve - the one with the numbers on it There is the valve that you can turn clockwise and anti clockwise The underneath that is 3 little teeth that can move up and down underneath that is a big nut, then there is a pipe...

sorry for being dim but what is the TRV valve? The thermostat thingy is at maximum and the knob on the otherside wgich says + and - is in the middle So sorry of this doesn't help you

Hi all, I have read a few previous posts, but they are not specific to my problem. I hope someone can help out there. I have a combination gas boiler and all the other radiators are working fine except one in the back bedroom - it has not worked for months and now it is too cold and i need...