Thermostatic radiator valve problems

radiator humour image by John Sfondilias from

Steam radiators that heat a room can be regulated with a variety of technologically advanced controls. An older, but effective, way of controlling the temperature fluctuations is through a thermostatic radiator valve.


Thermostatic radiator valves (TRVs) are encompassed within a temperature sensitive bellows assembly. The bellows assembly is covered with a plastic sheath that can be turned, creating pressure on the bellows, to adjust the temperature to the desired value.


Like any mechanical device, problems can arise that need attention. If a valve will not shut off, there may be debris hindering the function within the valve body. Leaking can also occur, signifying a loose valve insert that needs tightening. Also, if the valve is not working or creating the correct temperature, the installation may be faulty or loose.

Expert Insight

Keep curtains or obstructions away from the TRV. This affects its temperature sensing technique, causing the heat in the room to not match the temperature the user expects.

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