It is very important to make sure you preheat the grill properly if you want to achieve the proper high temperature range.Light your grill according to the instructions in your owner's manual.Then, turn your burners up, close the lid, and wait about 15 minutes. After 15 minutes, the grill should be between 500 and 550 degrees Fahrenheit. Properly preheating the grill is also one of the most important steps in preventing food from sticking to the cooking grates.