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Old 27.03.2020, 18:31
ThomasSSS ThomasSSS is offline
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Re: Radiator valve reducing temperature

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Basic question, I turn the radiator valve to minimum, but it still produces too much heat. How do you adjust these things? It's one of those large manual control knobs on the radiator.
It might be jammed open. I think what is common here is that pressure on a pin causes the valve to open. The thermostat provides this pressure. So removing the thermostat entirely should allow the pin to come out a bit and then the valve is closed.

In the case that it is jammed, the pin will stay depressed, and then the valve stays open. You should be able to unscrew the thermostat to check this. If it is stuck, there are various youtube videos, etc, of how to unstick the situation - tapping, twisting the pin with pliers, and so on.

Once the valve is confirmed unstuck (and off, in the no-pressure condition), you can decide if the thermostat is the problem. If so, there are various replacements from simple thermally sensitive metal bars to zigbee/zwave enabled remote actuators.
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