Possible Causes & Solutions:
Battery is dead:Unscrew the ignition button and replace the battery.
Cylinder valve is closed:Open the valve.
Blockage in orifice or pilot tube:Clean or replace the orifice or pilot tube.
Air in gas line:Press the control knob in for no more than 1–2 minutes, or until you smell gas.
Low gas pressure with cylinder valve fully open:Turn the cylinder valve OFF and replace the cylinder.
Thermocouple is not functioning properly:Ensure the thermocouple is lined up over the pilot valve correctly.