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Recent LiftMaster 8550-related questions: Error Code 42. How To Clear.My Lift Master 8550-267 door control display has an error code 42.Read out is: "EXCESSIVE OPENING FO... Error Code 15, Motor Control.
The belt will move 1/4 in then stops.Check he sensors etc. The up/down arrows keeps flashing on the ... Why Do I See The Message 'hardware Failure Error Code 22?'
There was a power cut for 5 hours.