THERMOSTAT INSPECTION

  1. INSPECT THERMOSTAT

    Tech Tips

    The valve opening temperature is inscribed on the thermostat.

    A011UYQ

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

      A011RSW

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

      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.

      A011RBIE09
      Text in Illustration
      *a Valve Lift
      Valve lift
      7.7 mm (0.3031 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 low temperatures (below 40°C (104°F)).

      If it is not fully closed, replace the thermostat.