HomeX Logo

Sorry, the web browser you're using is not supported by this website.

Please use Google Chrome, Firefox, Safari, or another browser to access homex.com. Thank you.

Skip to main content

We use cookies to enhance your experience. For details on how we use cookies, collect data, & how to manage your consent please see our Cookie Policy & Privacy Policy.

Thermostat Issues Cause Water Temperature Problems

Water heater thermostats help maintain a consistent water temperature in your home. When one breaks, the temperature of your water can start to become completely unpredictable, which can be more than a minor annoyance.

Check Your Water Heater Thermostat

Water heaters have two thermostats, one for each heating element, that measure the temperature of the water and tell the element if it should keep heating the water or not.

If the thermostat is damaged, your water heater won't know when to heat the water in the tank, which can cause the water to be too hot or too cold. In some cases, it may also blow a circuit breaker.

Thermostats can break down over time or in a sudden event, like a power surge. Once a good thermostat goes bad, there's no way to reverse it. The thermostat will need to be replaced.

How to check your water heater thermostat

  • Once you're sure the circuit is off and no one will turn it back on, remove the metal cover near the top of the tank. Inside the cover you'll see the thermostat with a large red button. The reset button may have tripped.

    Push in on the red button and listen for a click. If it clicks, replace the cover, then turn the circuit breaker back on. When you put your ear up to the hot water heater, you should hear a humming sound.

  • Sometimes the click can be hard to hear. Try running some hot water, just in case it worked. If you have hot water, great! If not, and the thermostat trips again, it's time to replace your thermostat.

  • If you get hot water, but it runs out after a few minutes, the faulty thermostat may have caused an element to burn out.

If your water heater thermostat seems fine but you still have no hot water or the water is too hot, consider other possible issues.

What to Do if You Have a Faulty Water Heater Thermostat

You'll need to have a technician replace the broken thermostat. Without a functioning thermostat in your water heater, the water temperature around your home will be too hot or too cold, and that's not fun for anyone.

NOTE: This content is for informational purposes only, and HomeX and its affiliates disclaim all liability related to it. If you decide to perform any tasks based on this information, you assume all risks, including the risk of loss or damage to property or personal injury.

Let's Get It Fixed!

Our virtual experts can diagnose your issue (for free!) and resolve simple problems.

What Did You Think of This Article?

What Did You Think of This Article?