Before installing any thermostat be sure to test it in a pot of water. This will ensure you do not install a bad thermostat.

To test it, start by hanging it by two pieces of wire hanger from the pot handles. The thermostat should be fully submerged in the water but should not be touching the bottom of the pot.

Then place a thermometer in the water. Use one that is designed for cooking, such as this candy thermometer.

Heat up the water and watch as it approaches the opening temp of the thermostat. This thermostat is rated at 80°C/176°F. It should open at that temperature.

Let the water cool again before removing it.