[. . . ] Press and hold the MODE button for 10 seconds to enter configuration mode. [. . . ] To change the current selection, press the + button, then press the MODE button to confirm and move on to the next setting. You can unlock the keypad by entering the configuration mode again (pressing the MODE button for 10 seconds). 4) When another transmitter is associated, you must configure the type of installation on your thermostat. Follow the steps below to associate the thermostat with a receiver: - on the receiver, press the configuration button until the LED flashes (see the receiver guide), - on the thermostat in shutdown mode, press the + button for 3 seconds. The thermostat displays CnF (1) - briefly press the + button again, - check that the LED is no longer flashing on the receiver. The MODE button is used to select the different operating modes of the thermostat ((2)Comfort *, (3) Economy *, (4) Frost protection , (5) AUTO, (6) Shutdown ). [. . . ] Never leave used batteries in the unit (the warranty does not cover damage due to faulty batteries). [. . . ]