It seems a lot of people experience problems with these, including myself. From what I've seen most of the issues are pretty simple electrical problems easily resolved. One is that the electric motor develops a flat spot, probably from road vibration, and then refuses to engage without a healthy rap with a rock or hammer. That's fixed with a motor replacement. The second is that the step won't retract when the coach door is closed. This is usually caused by the magnetic sensor in the door frame not being able to detect the magnet in the door when the door is closed. Simple test to verify this is to hold a magnet next to the sensor in the door frame. If the steps retract, that's the problem. The simplest fix for this is to shim out the magnet in the door so that when the door is closed the magnet is closer to the sensor. A garden hose washer is usually enough for this fix.