Thermostat TestReplace 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.|
|2.||Heat the water, and check the temperature with a thermometer. Check the temperature where the thermostat first opens, and where it is fully open.|
|3.||Measure the lift height of the thermostat when it is fully open.|