THERMOSTAT INSPECTION

  1. INSPECT THERMOSTAT

    Tech Tips

    The valve opening temperature is inscribed on the thermostat.

    A011UYQE01

    1. Immerse the thermostat in water, and then gradually heat the water.

      A011RSWE01

    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 valve does not open as specified, replace the thermostat.

    3. Check the valve lift.

      A011UJ0E01
      Text in Illustration
      *a Valve Lift
      Standard valve lift
      10 mm (0.394 in.) or more at 95°C (203°F)

      If the valve lift is not as specified, replace the thermostat.

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

      If the valve is not fully closed, replace the thermostat.