How can i set My cab up to switch the power off if the temp gets too high?

[mountainman]

Another option if you don't wanna spend that much money, or if you want to set it at a lower temperature....

Buy an inexpensive thermostat from Home Depot or Lowes (usually a cheap one is around $20) and wire it to a relay to swith the light on and off (relays are around $5-10 at radio shack). If you need any help, lemme know.