It's pretty straight forward - certainly not rocket science. Anything you find via google about a home's hot water heater element will apply. In a nutshell... test for voltage (make sure breaker is on)... then test for resistance by removing the leads (breaker off), looking for just a few ohms - maybe 10 or so. Anything higher is bad. Typically a shot element will come in at "k" ohms or higher. Often times, you can get a replacement at HD or Lowes.