If not, the venturi may be clogged. Go back to step one. If you do not see a spark, check to see if the wire is loose. Replace a cracked or dirty electrode. Check the gas supply line.
Hoses can develop dangerous leaks over time.
Cooking residue also accumulates on hoses. Animals such as mice and squirrels may find them appealing as a snack and chew on them. Rub a light coat of soapy water on the hose and look for bubbles. Replace the hose if necessary. Clean the grill body, inside and out, especially the inside of the lid.