New pitboss

[Jimmo]

Last night my grill was reading at 365 degrees but the oven thermometer inside grill was 250. It took chicken thighs 2:15 to get to 165 degrees. I used the griddle from my woodcreek pellet grill as a drip pan. Griddle is very heavy cast iron square. I haven't used grill 20 times yet. This morning I turned grill on and the temp matched oven thermometer perfectly. Can anyone advise Me on why temperature was so different. Thanks jim