Thermostat Test
Replace the thermostat if it is open at room temperature.
To test a closed thermostat:
| 1. | Suspend the thermostat (A) in a container of water. Do not let the thermometer (B) touch the bottom of the hot container.
 BA |
| 2. | Heat the water, and check the temperature with a thermometer. Check the temperature at which the thermostat first opens, and at which it is fully open.
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| 3. | Measure the lift height of the thermostat when it is fully open.
STANDARD THERMOSTAT| Lift height: | above 8.0 mm (0.31 in.) | | Starts opening: | 76-80°C (169-176°F) | | Fully open: | 90°C (194°F) | |