You coach steps should always either COME OUT whenever you open the door, or they STAY OUT all the time when parked, depending on which way you have your door SWITCH pushed.
If the steps are not coming out, I suppose it's either the Use/Store switch is in the STORE position, OR, your batteries are too low and they don't have enough power to move.
OR, check the magnet on the bottom of the screen door, usually on the hinge side. It is actually what 'tells' the steps to open and come out when you open the screen door. If that magnet has pulled from it's placement(is stuck to the other magnet), the system will not know that you are opening the door - it will continue to think that the screen is closed, therefore not engaging the steps.
two Campers, two Electric cars
former diesel pusher traveler