PRE-GRILL CHECKLIST A COLD WEATHER WARNING: PROPANE Extremely cold temperatures may cause your Trident TM burners to light inside the burners instead of outside. Once lit, if you hear a 'whooshing' sound, immediately turn the burner knobs off to extinguish the flame and then immediately re-light the burners. BEFORE YOUR FIRST USE There are a few must-check safety precautions to consider before you use your grill.