Thanks for your information. I think i might have just been a little impatient. Its the first time I started it brand new yesterday. I think it is leveled out good now. Thanks again.What type of pellet smoker do you have? How long have you had it? How long does it stay over 400 during a cook? Sometimes there are swings but only for a few minutes and this is normal. If it stays above 400 it might be your internal thermometer probe. You can call Pit Boss customer service 1-877-303-3134 and leave a call back number. They can help you trouble shoot.