I had a issue with using func_door_rotating, and so found this thread. I tried using prop_door_rotating instead.
Perhaps I have missed something.
Prop_door_rotating has the "Hinge Axis" property, with two coordinates as a value to set the Hinge axis. No matter where I set these two coordinates, using the helper, the door always rotates along the prop's center, in Z axis. Possibly a bug. I've been trying to set for Y axis. There is no flag for this to check for this entity. I must use func_door_rotating of there is no solution for this.