It's pretty much the same as the 6400 only difference is you have to switch of the tractor to validate the calibration when it finishes. Did you heat it up to 36 degrees before you started
If it was 50 it's too warm needs to be between 36 and 46 you will see ct come up on the right screen on the dash and when it's finished calibration 1-2 will flash the same as 6400
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