INSPECT THERMOSTAT
The valve opening temperature is inscribed on the thermostat.
Immerse the thermostat in water, and then gradually heat the water.
Check the valve opening temperature of the thermostat.
| Standard valve opening temperature |
|---|
| 80 to 84°C (176 to 183°F) |
If the valve opening temperature is not as specified, replace the thermostat.
Check the valve lift.
| Standard valve lift |
|---|
| 10 mm (0.39 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 at low temperatures (below 77°C (171°F)).
If it is not fully closed, replace the thermostat.