Just took on 8 of these units, the first trouble call on one of the garage units, the mechanic calls and tells me that the car is on automatic, but won't answer any hall calls, or open the doors. he can give it car calls with the tool, and car runs but no doors, i had him check the D26 door parameter, he indicates it is at 1. had him set it back to 0, and car back in service. anyone have any ideas? could a power spike cause just this 1 parameter to change. seems a little strange. hate to think that someone would purposely do this to try and make it hard on us, but it sure looks that way. or maybe I'm just being paranoid.