The motor on my juicer seems to "give out" intermittently. A year ago it stopped working - check circuit breaker, GFI, etc to no avail. I put it in the closet and forgot about it. Took it out a month ago... and it seemed to have healed. Using it fine for a month... now it died again after juicing a pineapple. It never quits WHILE juicing; only after juicing. Is there some sort of heat switch or auto reset built in?