THERMOSTAT INSPECTION

PROCEDURE


  1. INSPECT THERMOSTAT

    Tech Tips

    The valve opening temperature is inscribed on the thermostat.

    B0047D6

    1. B00464D

      Immerse the thermostat in water and gradually heat the water.

      CAUTION:

      Be careful about burns.

    2. Check that the valve of the thermostat opens at the specified temperature.

      Standard valve opening temperature
      80 to 84°C (176 to 183°F)

      If the result is not as specified, replace the thermostat.

    3. B004654C03
      *a Valve Lift

      Check the valve lift.

      Standard valve lift
      10 mm (0.394 in.) or more at 95°C (203°F)

      If the result is not as specified, replace the thermostat.

    4. Check that the valve is fully closed when the thermostat is at low temperatures (below 77°C (171°F)).

      If it is not fully closed, replace the thermostat.