Found Booster Heater Dishwasher unit idle with wash temp at 170. Ran rack through found rinse temps did not rise above 120 and booster never kicked to heat. Checked over booster found limit tripped. Reset and found contactors to latch and begin heating. Found 8 amps on all legs. let heat until satisfied. Ran multiple racks through unit. Found rinse temp at around 200 degrees. Lowered thermostat and ran racks through. Found rinse temp at 190 degrees every time. Unit is operating correctly at this time.