Go to post #2 and the P 1, I 0 and D 0, then go to your manual and find this (senario P 7, I 0 and D 0). This is what I did with my Mes 40 when the out of the box setting was terrible and auto tune was terrible. In P mode I and D at 0, 7 degrees below set temp is 7/7=1 full output solid green light, then 6 degrees below set point flashes and is 6/7, 5/7, 4/7 3/7 2/7 1/7 then (0/7off at set point.) try it without values in I or D. once you add values in I and D then this senario doesn't exist and will come out of full power below 7 degrees of set temp and takes longer to get to set temp. When temp gets to the set temp the light goes out. When the set temp is reached then drops below the set temp then it flashes at 1/7 which is too slow of an output response and the temp drops that's why I use a P 1, I 0 and D 0 for one degree below set temp is 1/1 = full output solid green light .5 degree below set temp flashes 50% and off at set temp even though the resolution is one degree increments it works in a fraction of a degree with P 1. P 0 is an on off controller like the stock Mes controller no matter what value is in I and D so have a min of 1 in the P. This zips you to your set temp with a load in 20 minutes and stabilizes in a couple cycles without screwing with getting to set temp in over an hour in the initial food warm up let alone preheating. You're literally cutting out over an hour of initial waiting to get your smoker to initial set temp. So P value should be in the single digits, then add in the I value like 208 and D 210 like Chopsaw if necessary. I'm totally comfortable not having a value in the I or D cooking ribs, butts and brisket at 275 and my sensor is always at food level down through the top vent a couple inches off the side wall so I know that's the hottest spot in my smoker where my food is below the top vent which is the hottest spot in the smoker couple inches bellow the top vent where heat stacks like a water heater moving around trying to get out. I didn't make this up it's in my ws1510 elpm manual and 2 hours after getting this PID years ago I've been zipping right to temp and holding within a couple degrees of set temp instead of staring at my PID saying when are you going to get to temp.