It's a horrible design, as soon as the econo gets some dust in it the gears bind against the sheet metal and the actuator dies or the gear hubs strip out. I have made the repair by replacing the gears which, while not a fun job is possible and cheaper than a new econo. Carrier never seems to have a handle on MicroMetl products. Maybe because micrometl changes their design as often as Carrier does. Moving forward, silicone at the inspection keeps the gears from binding.
These Are The Good Old Days