The valve opening temperature is inscribed on the thermostat.
Immerse the thermostat in water and then gradually heat the water.
Do not your hands into the water that has been heated for the inspection.
Touching the heated water could result in burns.
Check the valve opening temperature.
|Standard valve opening temperature|
|80 to 84°C (176 to 183°F)|
If the valve opening temperature is not within the specified range, replace the thermostat.
Check the 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.
Check that the valve is fully closed when the thermostat is below 77°C (171°F).
If the valve is not fully closed, replace the thermostat.