How to relight a water heater thermostat?

Understanding Your Water Heater Thermostat

Few things are as frustrating as a cold shower unexpectedly. While many issues can cause a lack of hot water, one of the most common culprit is often a problem with the water heater thermostat. But what exactly is a water heater thermostat, and how does it work? In essence, your water heater thermostat is the control center for your water heater’s temperature. It’s the component that senses the water temperature and signals the heating element (in electric heaters) or gas burner (in gas heaters) to turn on or off to maintain your desired hot water level. When this vital part malfunctions or is improperly set, you can find yourself in an uncomfortably cool situation. This guide will delve into how to relight a water heater thermostat, offering practical advice to help you regain your hot water supply.

Troubleshooting Your Water Heater Thermostat

Before we dive into the “how-to” of relighting, it’s crucial to understand that not all thermostat issues are about relighting. Sometimes, the problem might be as simple as the thermostat being turned down too low, or a tripped circuit breaker (for electric models). For gas water heaters, the pilot light might have gone out. If the pilot light is the issue, “relighting” will be the primary focus. For electric water heaters, the thermostat itself doesn’t typically need to be “relighted” in the same way a pilot light does; rather, it might need to be reset or, in rarer cases, replaced if it’s faulty. Understanding the type of water heater you have – gas or electric – is the first step in deciphering the problem correctly.

How to Relight a Gas Water Heater Thermostat Pilot Light

When people ask about how to relight a water heater thermostat, they are very often referring to the pilot light on a gas water heater. This is a small, continuous flame that ignies the main burner when the thermostat calls for heat. If this pilot light goes out, your water heater will stop heating water. Here’s a step-by-step guide to relighting it:

Turn off gas supply: Always begin by locating the gas control valve on your water heater. This usually has an “ON,” “OFF,” and “PILOT” setting. Turn the knob to the “OFF” position to shut off the gas supply.
Wait for gas to dissipate: Before attempting to relight, allow at least five minutes for any residual gas to dissipate from the area. This is a crucial safety step.
Locate the pilot light assembly: Most modern gas water heaters have a small access panel or window near the bottom of the unit where you can see the pilot light assembly.
Set the gas control to “PILOT”: Turn the gas control knob to the “PILOT” position.
Press and hold the pilot button: While holding the knob in the “PILOT” position (this often requires pressing it down), use a long lighter or a lit match to ignite the pilot light. Hold the flame to the pilot tube until the pilot light ignites.
Continue holding: Keep holding the pilot button down for about 30-60 seconds after the pilot light has ignited. This allows the thermocouple (a safety device that senses the pilot flame) to heat up and keep the pilot lit.
Release the pilot button: Slowly release the pilot button and the pilot light should remain lit.
Turn the control to “ON”: Once the pilot light is confirmed to be burning steadily, turn the gas control knob to the “ON” position. You should hear the main burner ignite shortly after, and your water heater will begin heating water again.
Check water temperature: Allow some time for the water to heat up, and then test your hot water.

It’s important to note that the exact procedure might vary slightly depending on the make and model of your water heater. Always refer to your owner’s manual for specific instructions.

Electric Water Heater Thermostat Reset

For electric water heaters, the thermostat doesn’t have a pilot light to relight. Instead, you might need to reset it if it has tripped due to a power surge or other electrical issue. Here’s how to approach this:

Turn off power: The absolute first step is crucial for safety. Locate your home’s electrical panel and find the breaker switch that controls your water heater. Flip it to the “OFF” position.
Access the thermostat: You’ll need to remove an access panel or cover on the side of the water heater to reach the thermostat(s). There are usually two thermostats on electric water heaters, one for the upper heating element and one for the lower.
Locate the reset button: Many electric water heater thermostats have a small red or white reset button. It’s often recessed and might be labeled “reset.”
Press the reset button: Using a pencil eraser or a similar blunt object, firmly press the reset button. You might feel a slight click if it successfully resets.
Replace the access panel: Once the reset is complete, carefully replace the access panel.
Restore power: Return to your electrical panel and flip the water heater breaker back to the “ON” position.
Check for hot water: Give your water heater some time to heat the water. Test your hot water taps to see if the issue has been resolved.

If your electric water heater thermostat doesn’t have a reset button or if resetting it doesn’t solve the problem, the thermostat itself may be faulty and require replacement. This is when professional help becomes essential.

When to Call a Professional Plumber

While understanding how to relight a water heater thermostat is a useful homeowner skill, there are times when it’s best to call in the experts. If you’ve followed the steps above and still don’t have hot water, or if you feel uncomfortable performing any of these tasks, it’s time to seek professional assistance. Signs that you should call a plumber include:

The pilot light won’t stay lit after multiple attempts.
You smell gas even after the unit is off.
You notice any leaks from the water heater.
The water heater is making unusual noises.
You suspect a faulty thermostat or heating element.
You are unsure of the type of water heater or its components.

For reliable and expert help with your water heater, including thermostat issues and more, the USA Plumbing Directory is your trusted nationwide free connection service. We connect you directly with experienced, licensed, and insured local plumbing contractors who can diagnose and fix any issue efficiently. Our service ensures you find the right professional for the job, saving you time and hassle.

Conclusion

Restoring hot water to your home is often achievable with a few simple steps, especially when it comes to understanding how to relight a water heater thermostat’s pilot light or resetting an electric thermostat. However, plumbing can be complex, and safety should always be your top priority. If you’re ever in doubt or face persistent problems, don’t hesitate to reach out to a qualified professional. The USA Plumbing Directory exists to make that connection seamless and stress-free. They offer a free, nationwide service to put you in touch with the best local plumbing contractors, ensuring your water heater is back in working order quickly and safely.

Don’t let a cold shower ruin your day. If you’re experiencing issues with your water heater thermostat or any other plumbing problem, call the USA Plumbing Directory today to connect with a local expert!