How To Use A Propane Grill As A Smoker. A smoker box works by transferring the heat from your gas grill’s burners to the wood chips inside. After around 90 minutes, it may be a good idea to check your food or move some food around.
Aim for a target cooking temperature of 225°f (107°c). Also check that the door to your smoker is firmly shut, and that your propane tank gauge is returning a good reading.
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Connect the propane burner and the smoker, then open the valves. Cooking time and technique will depend heavily on what you intend to smoke, meaning closely monitoring the grill temperature and adjusting as necessary will be crucial to avoid overcooking.