Does your Stairmaster machine work in manual mode, but every time you try a program the machine stops working?
It is possible that the console on your Stairmaster unit may not be configured for the appropriate machine. This can result in the console accepting and allowing a manual workout but not accepting or allowing a program.
Check the machine type set up of your console and configure it for the type of machine the console is being used on. For example, if you have a stepper, the machine type of the console set up should be Stepper.