Mine's still running fine - from 91. Like most things stuff happens - when your talking air conditioners lots of small/inexpensive stuff can impact whether they work right (thermostat, fan motor, capacitor etc) and "die" usually means something expensive like compressor or freon leak. What happened to yours?
Running AC on low current is one method that results in premature death - always good to keep an eye on voltage when running your air conditioner.
Kevin