Door will not open unless the wall mounted button is pressed and held down. Previously, a touch of the button and the door opened properly. Now once the button is released, the door reverses and stops. It will not operate with the remote opener. The red ligth across the bottom opening of the door does not light up. If the door is opened two or three times in a row by holding the button down, it will stop working completely and the visible light on the button goes out. After about 10 or 15 minutes, the light will come back on and the door can again be opened as long as the button is held down. Please advise as to what the problem sounds like. Thank you.