The mainboard parameter settings of the Wanhe gas water heater need to be carried out through the buttons on the panel. The specific steps are as follows: Make sure the gas water heater is powered on and in working condition. Press the "On/Off" button on the panel to put the water heater into standby mode. Press the "▲" and "▼" keys on the panel at the same time to enter the motherboard parameter setting interface. In the motherboard parameter setting interface, you can use the "▲" and "▼" keys to select up and down, and use the "+" and "-" keys to adjust values. According to needs, various parameters of the gas water heater can be set, including temperature, pressure, timer on and off, etc. After the setting is completed, press the "On/Off" button again to exit the mainboard parameter setting interface and the water heater returns to working status