These codes are harmless and will effect nothing. Our policy is to
leave no corupt info behind in the unlikely event of a future a/c fault. Then if we begin to diagnose, any codes that are stored are
genuine and not a result from previous repairs.
For the DIY'ers, if you have a a/c fault later down the road, just tell the service writer that the a/c head was unplugged so the tech does'nt start going in the wrong direction with testing.
DR.D