THERMOSTAT INSPECTION

PROCEDURE


  1. INSPECT WATER INLET WITH THERMOSTAT SUB-ASSEMBLY


    1. A004X64

      Immerse the water inlet with thermostat sub-assembly in water and then gradually heat the water.

    2. Check the valve opening temperature of the water inlet with thermostat sub-assembly.

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

      Tech Tips

      If the valve opening temperature is not as specified, replace the water inlet with thermostat sub-assembly.

    3. A004Z4DE02
      Text in Illustration
      *A Compression Spring Shape: Tapered
      *B Compression Spring Shape: Straight
      *a Valve Lift
      *b Compression Spring

      Check the valve lift.

      Standard Valve Lift
      Compression Spring Shape Condition Specified Condition
      Tapered 95°C (203°F) 10 to 14 mm (0.394 to 0.551 in.)
      Straight 8 mm (0.315 in.) or more

      Tech Tips

      If the valve lift is not as specified, replace the water inlet with thermostat sub-assembly.

    4. Check that the valve is fully closed when the water inlet with thermostat sub-assembly is at low temperatures (below 77°C (171°F)).

      Tech Tips

      If it is not fully closed, replace the water inlet with thermostat sub-assembly.