Is this an up and over door or a sectional, If its a sectional door then the top guide wheels may need adjusting slightly.
It's a sectional door, make is Henderson.
In that case at the top of the top section there will be two little wheels that follow a different track to the others and provide the downward force on the door seel strip when closed, simply loosen the adjusters off close the door then retighten them, it doesn't take much to force the motor to reverse