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Radiators getting hot even when thermostat is turned right down. Its a Worcester combined boiler

  • What model is it? – ThreePhaseEel Dec 23 '16 at 21:18
  • As I understand it, the room-thermostat just determines when the boiler comes on and for how long, it doesn't affect radiator temperature. Radiator temperature is mainly controlled by the boiler temperature setting. – RedGrittyBrick Dec 23 '16 at 22:25
  • A little more information would be helpful. did this just start happening? is the boiler cycling on and off? – Ed Beal Dec 27 '16 at 14:07
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  1. Check if a zone valve is stuck open.

  2. Check if there's another thermostat (e.g. behind furniture) calling for heat.

  3. If the thermostat is battery operated (e.g. on a timer), check that the battery is OK.

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