Follow the below steps in order to re-calibrate the TRV to the radiator:
- Remove the TRV from the radiator
- Take out one of the batteries, and re-insert
- The TRV will calibrate and the pin will move open and close (this process takes 5 mins, the pin moves very slowly but you will hear a winding noise)
- When the pin has recessed back into the valve (not extended), remove the battery (this will lock its position)
- Screw the TRV back on to the radiator, finger tight (you may insert a 1p coin in between the valve pin and the radiator pin to help with closing the pin)
- Re-insert the battery and the TRV will calibrate to the radiator
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