If it were me I would manually level it to your liking using a 3' or larger level in a few different places. Than ones you are happy with it do the recalibration.
Turn power off on control panel.
Press the up (Front) 10 times
Then down (Rear) 10 times
It will beep and tell you to press ENTER the it will beep again and say calibrated!!!
Done deal.
I do this every so often
Hope this helps
Jerrod
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