The spa will show priming on the control panel until the pipes are full of water, then it will automatically start heating to the factory set temperature of 38 degrees. It will also begin filtering the water based on the recommended daily times. The time can be set by pushing the UP button until the screen shows time, push the OK button twice to access the clock and date settings, to scroll between these keep pressing the OK button. To change each setting use the UP and DOWN buttons then press OK to confirm. To set the temperature, select the STMP option on the main menu or just push and hold the UP and DOWN buttons on the right hand side of the screen until the numbers change. There are other non-essential settings and features which can be managed through the main menu. These features and how to modify them are explained in detail in your manual and on the DVD supplied in your spa warranty kit.