How To Test Water Heater Thermostat?

Do you have an old water heater that has been giving you problems recently? If so, then it may be time to take a deeper look and see what may be causing the issues. Testing your water heater thermostat can be an important first step in determining what could be going wrong.

In this article, you’ll learn how to properly check and make sure that everything is functioning correctly. With the right knowledge and guidance on your side, you’ll have the thermostat tested quickly and safely.

So if your water heater is malfunctioning, read on to learn more about how to test your water heater thermostat!

What is a Thermostat?

A thermostat is a device that senses the temperature of a system and actuates a device, such as a furnace or air conditioner, to maintain the temperature at a preset level.

In the case of a water heater, the thermostat is usually located near the bottom of the tank and is responsible for turning the heating element on or off depending on the temperature of the water.

Why You Should Test Your Water Heater Thermostat?

Testing your water heater thermostat is important to ensure that it is operating correctly and providing the necessary hot water for your home.

If the thermostat is not functioning properly, your water heater may not be providing enough hot water or, more dangerously, may be providing unsafe levels of heat that could cause burns or even a fire. It is important to test the thermostat regularly to make sure that it is functioning as it should.

How to Test Water Heater Thermostat?

Step 1: Safety First!

Before you begin testing your thermostat, it is important to make sure that the water heater is off.

This can be done by turning off the power to the heater at the circuit breaker or disconnecting the power cord. You should also turn off the cold water supply to the heater and allow the heater to cool down before proceeding.

Step 2: Know Your Heater and Thermostat

It is important to be familiar with your water heater and the thermostat that controls it. Make sure you know where the thermostat is located, how to access it, and how to adjust it if needed.

Step 3: Test the Temperature

Once the heater has cooled down, you can test the temperature of the water inside by using a thermometer.

Make sure to take several readings from different areas of the tank to get an accurate result.

Step 4: Test the Thermostat

The next step is to test the thermostat. This can be done by turning the thermostat dial to the highest setting and turning on the power to the heater. After a few minutes, check the water temperature with a thermometer. If the water has reached the desired temperature, then the thermostat is functioning properly.

Step 5: Adjust the Temperature

If the water is not at the desired temperature, then you may need to adjust the thermostat. This can be done by turning the dial to a lower setting and allowing the water to heat up again. Keep testing the water temperature until you reach the desired level.


Testing your water heater thermostat is an important part of routine maintenance. When done properly and regularly, this can help ensure that your water heater is running safely and providing the necessary hot water for your home. If the thermostat is not functioning properly, you should contact a professional to make the necessary repairs. Citations: http://www. energystar. gov/index. cfm?c=bulk_purchasing. bus_heaters_guidehttps://energy. gov/energysaver/water-heater-thermostathttps://www. anl. gov/articles/how-test-your-water-heater-thermostat

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