Test the gas hose and connectors for leaks by coating them with some dish soap mixed with a little water. Turn on the gas but don’t light the grill. If bubbles are forming, then gas is leaking and those parts need to be replaced to avoid the risk of a dangerous explosion.
Remove the cooking grates and the metal plates above the burners. They should be cleaned at least once every season. Check the color of the flame in your grill. If the flame is a weak orange or yellow instead of blue, brush out the Venturi tubes and adjust the shutters. Your grill’s burners are shaped like a bow tie, an H or an oval. Make sure all their ports are clear for an even flame. They may need to be cleaned or replaced.
Check the ignition point. It may need to be cleaned or the batteries in your igniter may need to be changed. If you need to replace the igniter or any other part, check with your dealer or the manufacturer’s website.