Check all burner ports for rust and blockages. White spiders love to nest inside the tubes. Clean them out with a pipe cleaner or wire if necessary.
Make sure that all hoses are free of cracks or damage
Make sure all hoses, connections and traps are free of grease
Check all propane cylinder hoses and connections for leaks. Brush a mixture of 50% water & 50% soap on all connections and hoses. Repair or tighten if any bubbles form and then repeat the test
Replace any components of your barbecue that are worn or do not appear to be operating properly
If you wish, contact a certified fuel appliance repair person to inspect your barbecue
Flame-retardant material in place as required underneath the barbecue.
Starting your Barbecue
Leave your grill hood open when starting the barbecue.
Open the propane cylinder first and then turn your barbecue on with the grill controls.
Press the igniter button or insert the flame using a long match or barbecue lighter through the appropriate side hole or opening.
If you are using a match, make sure to light it prior to turning on the gas at the grill control.
If the burner does not ignite, turn off the gas, keep the lid open, wait five minutes and try again.
Shutting off your Barbecue
Turn off the propane valve first.
Turn off the burner second to allow any residual gas trapped in the lines to burn off.
Allow your barbecue to completely cool down before covering it.
Source: MaintainX (Community Member)