See my post here: ISC-027BW missing the target temperature and go over - #9 by Tania
Operate your device in an oxygen-deprived environment so that combustion relies primarily on the controller.
In a kamado, if you’ve lit too much charcoal at the start, it’s often already too late: the rate at which the temperature rises will have already caused the temperature to overshoot.
If you want the PID to manage everything properly in a kamado:
- start lighting the BBQ at least 40 minutes earlier than usual;
- close the vent-out as much as possible;
- make sure there are no leaks (gasket, vent-in, etc.);
- light only a small amount of charcoal in the initial phase;
M