In most cases I've seen, the control module is the likely suspect when the steps start functioning intermittently. The correct replacement module for your 909506000 is part # LC379606. We have confirmed this with Lippert on a few different occasions. If you want to, you can to test the control module, but you will first need to obtain the Lippert Components Kwikee Step Tester part # LC379416. Once you have this then you can use the attached photos to test the control module.
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