1. Step 1: Plug in the power supply, press the switch button of the electric water heater and set the water temperature at the same time; 2. Step 2: After the water is boiled, we will first adjust the valve to the middle position, test the water temperature, and start using it when it is suitable; Step 3: Wait for the water temperature to be constant. Try not to touch the power supply with your hands or other parts during use. Please call Haier customer service to make an appointment to install 400-699-9999.