please do a restore to default. I worry some data may be changed.
first manual to 150F and change to auto mode then.
Please do not disturb when auto mode. no open door, no change air inlet/outlet, no touch controller
Try P=5,10,20,50,100 and I=0, D=0
Try also HDC=0090, 0080
It is really a trial and error process to find the best data for your very own pit