Disconnect the power supply from the GT125.
Hold the bottom button of the thermostat until the setup menu appears.
Press both buttons (up and down) at the same time until the text « RST » appears on the thermostat display.
Press the bottom button to select « YES »
Press both buttons (up and down) at the same time to confirm your choice.
The text « CONF » appears on the screen. Then press the bottom or top button to select « YES ».
Press both buttons (up and down) at the same time to confirm your choice.
The text « CLR » appears on the screen.
Reconnect the GT125’s power supply.
