[hbens]

Intermittent operation troubleshooting is fun (said nobody ever)!
I solved my problem once by reseating the relays in the compartment just in front of the door. I reseated all three of them. I'm not sure which solved the problem but only for a while.
I ended up replacing the motor, gear box and controller sourced on eBay. One of the bolts that holds the motor to the gear box is too long. I added a couple of washers to the bolt and the step works great.
I added links in a thread someone else started on this forum.