I am an Electrical Engineer, and have a question.
Of those that fail how many of you keep them outdoors?
The motor may get exposed to moisture, never a good thing.
Mine almost 2 years old is kept in the garage, with a cover I use it almost every week between 3 and 6 pizzas each time.
I just did the motor bearing change about a month ago, until that time it was just using the sleeve bearing, if it were outside I could see where corrosion would increase the resistance hence burn out the motor certainly reduce it.
My pastor has had his for about a year, he also keeps it inside no issues he still uses the original bearing.
My advise to all is:
1. Almost without saying, use the cover.
2. Bring it into the garage when not in use.
3. Remove the motor, keep it in a dry place (if your garage is damp, or you have it outside ).
4. Test spin the platen without the motor before using the oven.
Optional but not a bad idea.
5. Grease the bearing when necessary (I never did this but did clean and inspect it a few times).
6. Do the bearing MOD.
I keep the motor separate from the unit, and install it when I am about to fire up. Before doing so I spin the platen, to see how free it spins. This may help my motor life given any corrosion that may have accumulated is broken up by my spin. Therefore the inertia needed for the startup will be less strain on the motor.
With the bearing mod in place the drag is greatly reduced, I have a Weber rotisserie motor I have not tried yet as my backup.
I may have to test it out, I often have people over and it bode well for me if it did fail.