How to Use a Gas Barbecue? | A Safe Start-to-Finish Guide

Using a gas barbecue safely means lighting it with the lid open, preheating on high, and shutting off the fuel valve after every cook.

Firing up a gas grill looks simple, but the order of your steps matters more than you’d think. One wrong sequence—like turning on the gas before checking the knobs—can turn a backyard dinner into a fire hazard. The good news is that the whole process takes about 20 minutes from cold grill to dinner, and the routine becomes second nature after a few cooks. Whether you’re working with a propane tank or a natural-gas line, the same core rules apply.

Before You Light Anything

Do a quick safety sweep before you touch a knob. The National Fire Protection Association (NFPA) says to position the grill well away from your home, deck railings, eaves, and overhanging branches. Keep children and pets at least 3 feet from the grilling area, and never grill in an enclosed space.

Gas grills belong outdoors only—never in a garage, porch, shed, breezeway, tent, or any other enclosed area. Carbon monoxide builds up fast in enclosed spaces, and the consequences are fatal.

At the start of each season, inspect the burner tubes and gas passages for obstructions, and check the hoses for damage. If a hose is cracked, stiff, or worn, don’t use the grill until you replace it.

Lighting the Grill the Right Way

The most common mistake is turning on the gas first and then fumbling with the igniter. The correct order is: open the lid, confirm all burner knobs are off, then open the fuel supply.

For a propane grill, open the tank valve fully. For natural gas, make sure the gas line valve at the wall is open. Now—and only now—turn the first burner knob to the start or high position and press the igniter. If your grill has no igniter, use a long match or lighter inserted through the lighting hole. Never lean over the grill while lighting.

Once the first burner catches, turn on the additional burners you need. Then close the lid and preheat. Most manufacturer manuals specify 15 minutes on the start/high setting; some guides suggest 10 to 15 minutes. This burn-off clears old grease and gets the grates hot enough to sear properly.

Cooking, Then Shutting Down

After preheating, reduce the burners to your cooking temperature and put the food on. Use an instant-read thermometer to confirm safe internal temperatures—guessing by color is a common way to undercook poultry or pork.

When the food is done, the shutdown order is just as important as the startup. Turn all burner knobs to off, then close the propane tank valve. For natural-gas grills, shut the gas-line valve. This two-step shutdown makes sure no gas is left sitting in the line. Then clean grease and residue from the grates and trays once they’ve cooled—a clean grill flares up less on the next cook.

If you’re shopping for a grill while working through this setup, our tested roundup of the best bar bq gas grills covers models that simplify all of this with reliable igniters and easy-clean designs.

Handling Problems: Gas Smells and Grease Fires

If you smell gas while the grill is off, shut off the gas supply, extinguish any open flame, and open the lid. If the odor persists after you step away, call your gas company or the fire department from a safe distance.

A grease fire is the other common emergency. The instinct to spray water is wrong—water spreads flaming grease. Instead, turn off all burners and leave the lid closed until the fire is out. The lack of oxygen smothers the flames. Also, never put charcoal or lava rock in a gas grill unless the manufacturer explicitly allows it—the rating plate on the grill lists the correct fuel type, and some gas-grill manuals state outright that using anything else voids the design.

The most common cause of flare-ups is accumulated grease. Regular cleaning after each cook prevents most of these situations before they start.