Originally Posted by cmchase
The step operates from the control module and it works on resistance of the step or linkage. If the module is defective it will keep applying pressure.
The motors for Kwikee steps use an automotive power window motor to power the steps. When used in a car, they don't use a control module. If you stick your arm outside the window and roll it up, the motor by design will stop before severing your arm off. Even though the motor has enough power to inflict injury, when it encounters resistance it shuts the power off.
The design of the step has built in stops to force the motor to shut off. The control modules job is to tell the motor when it should or should not operate.
I agree with Acker1, replace the broken pot metal linkage, and check the start, stop travel adjustments on the step. Also make sure there is no bent or damaged mechanisms causing excessive stress on the motor linkage during operation.