Aqara E1 Manual De Usuario página 15

c. Press the thermostat button 3 consecutive times to calibrate the valve.
During calibration, the screen displays the [F12] symbol.
Note: the valve must be calibrated; otherwise it may cause abnormal temperature
control. Follow the above steps or click "More Settings" in the app to calibrate the valve.
d. The [F12] symbol disappears in about 10 seconds, and the screen displays
the currently set temperature, indicating the completion of installation.
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