search YouTube for
pit boss P setting - lots of vids explain it.
I believe the 1150 Pro has a PID controller, so no P setting.
From the user guide:
2. COLD WEATHER COOKING As it becomes cooler outside, that does not mean that grilling season is over! The crisp cool air and heavenly aroma of smoked foods will help cure your winter blues. Follow these suggestions on how to enjoy your grill throughout the cooler months:
• If smoking at low temperatures fails, increase the temperature slightly to achieve the same results.
• Organize – Get everything you require ready in the kitchen before you head outdoors. During the winter, move your grill to an area that is out of the wind and direct cold. Check local bylaws regarding the proximity of your grill in relation to your home and/or other structures. Put everything you need on a tray, bundle up tight, and get it done!
• To help keep track of the outside temperature, place an outdoor thermometer close to your cooking area. Keep a log or history of what you cooked, the outdoor temperature, and the cooking time. This will help later down the road to help you determine what to cook and how long it will take.
• In very cold weather, increase your preheating time by at least 20 minutes.
• Avoid lifting the lid any more than necessary. Cold gusts of wind can completely cool your grill temperature. Be flexible with your serving time; add extra cooking time each time you open the lid.
• Have a heated platter or a dish cover ready to keep your food warm while making the trip back inside.
• Ideal foods for winter cooking are those that require little attention, such as roasts, whole chickens, ribs, and turkey. Make your meal preparation even easier by adding simple items such as vegetables and potatoes.