Thermostat: Testing and Inspection

1GR-FE COOLING: THERMOSTAT: INSPECTION

1. INSPECT WATER INLET WITH THERMOSTAT

HINT
The valve opening temperature is inscribed on the thermostat.





(a) Immerse the thermostat in water, and then gradually heat the water.

(b) 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 water inlet with thermostat.

(c) Check the valve lift.





Text in Illustration





Standard valve lift:

8.0 mm (0.315 in.) or more at 95°C (203°F)

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

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

If not fully closed, replace the thermostat.