Thermostat: Specifications

If the thermostat opening voltage is greater than 0.94 volt and less than 75°C (167°F), or less than 0.53 and greater than 95°C (202°F), install a new thermostat.

If the thermostat opening voltage is less than 0.75 volt and greater than 82°C (180°F) or greater than 0.50 and less than 97°C (206°F), the water thermostat is good and a new