How To Restart A Rheem Water Heater?

To restart a rheem water heater, locate the reset button on the unit and press it. Wait for the water heater to ignite and start supplying hot water before using.

Welcome to our guide on how to restart a rheem water heater. If your water heater has stopped working or you need to reset it for any reason, don’t worry – it’s a straightforward process. We will walk you through the steps to restart your rheem water heater so that you can have hot water flowing in no time.

By following a few simple instructions, you’ll be able to ensure that your water heater is working efficiently and effectively once again. So let’s get started and restore your rheem water heater to its operational state.

How To Restart A Rheem Water Heater?


Common Issues With Rheem Water Heaters

Rheem water heaters are known for their reliability and durability. However, like any appliance, they can encounter common issues that may disrupt their performance. In this section, we will discuss three common issues that rheem water heater owners may encounter: the pilot light not igniting, no hot water, and water not getting hot enough.

Pilot Light Not Igniting

  • The pilot light is crucial for the proper functioning of a rheem water heater. If your pilot light fails to ignite, it could be due to one of the following reasons:
  • Gas supply issue: Check that the gas supply valve is open and that the gas line is connected properly.
  • Faulty thermocouple: The thermocouple is a safety device that detects if the pilot light is lit. If it is faulty, the pilot light will not stay lit.
  • Clogged pilot tube: The pilot tube may become clogged with debris, preventing the pilot light from igniting. Clean the tube carefully to remove any obstructions.

No Hot Water

  • If you’re experiencing a lack of hot water from your rheem water heater, consider the following potential causes:
  • Sediment buildup: Over time, sediment can accumulate at the bottom of the tank, reducing the heating efficiency. Flushing the tank regularly can help remove this buildup.
  • Thermostat issues: The thermostat controls the water temperature. If it is set too low or is defective, it can result in insufficient hot water. Adjusting the thermostat or replacing it may solve the problem.
  • Faulty heating element: Electric rheem water heaters use heating elements to warm the water. If a heating element is faulty, it may need to be replaced.
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Water Not Getting Hot Enough

  • If your rheem water heater is not providing water as hot as you would like, consider the following factors:
  • Temperature settings: Check the temperature settings on your water heater. You may need to adjust the thermostat to a higher temperature.
  • Sediment buildup: Similar to when there is no hot water, sediment buildup can reduce the heating efficiency, resulting in water that is not hot enough. Flushing the tank can help remove sediment and improve performance.
  • Insufficient size: If your water heater is too small for your household’s demand, it may struggle to provide hot water consistently. Consider upgrading to a larger capacity model if necessary.

Remember, if you encounter any issues with your rheem water heater that you are unsure how to resolve, it is always best to consult a professional technician.

Restarting A Rheem Water Heater Step-By-Step

Having hot water readily available in your home is a necessity, so when your rheem water heater suddenly stops working, it can be quite frustrating. Fortunately, restarting a rheem water heater is a relatively straightforward process that you can do on your own.

By following a few simple steps, you can have your water heater back up and running in no time. Let’s take a closer look at how you can restart your rheem water heater step-by-step.

Checking The Power Source

To begin the process of restarting your rheem water heater, it’s important to ensure that the power source is functioning properly. Here are the key points to keep in mind:

  • Check the circuit breaker or fuse box to ensure that the power is turned on for the water heater.
  • Make sure that the electrical connections are secure and free from any damage or loose wires.
  • Verify that the water heater’s power switch is in the “on” position.

Inspecting The Gas Supply

If your rheem water heater is gas-powered, it’s essential to inspect the gas supply before attempting to restart it. Follow these steps:

  • Ensure that the gas valve is fully open.
  • Inspect the gas line for any leaks or damage. If you detect a strong gas odor or notice any hissing sounds, evacuate the area immediately and contact a professional.

Relighting The Pilot Light

If the pilot light on your rheem water heater has gone out, relighting it is necessary. Here’s how you can relight the pilot light:

  • Locate the pilot light assembly, usually located near the bottom of the heater.
  • Turn the gas control knob to the “off” position and wait for at least five minutes for any residual gas to dissipate.
  • Turn the gas control knob to the “pilot” position and press the ignition button as you hold a lit match or lighter near the pilot orifice.
  • Once the pilot is lit, continue to hold the control knob for about one minute before releasing it.
  • Finally, set the gas control knob to the desired temperature setting.
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Adjusting The Temperature Settings

After restarting your rheem water heater, it’s a good idea to ensure that your temperature settings are appropriate for your needs. Consider the following:

  • Determine the ideal temperature for your water heater. Typically, this is around 120 degrees fahrenheit to prevent scalding and reduce energy consumption.
  • If you need to adjust the temperature, locate the temperature dial on the water heater, and carefully turn it to the desired setting.
  • Remember to allow some time for the temperature to stabilize after making any adjustments.

By carefully following these steps, you can successfully restart your rheem water heater and have it functioning efficiently once again. Remember, if you encounter any difficulties during the process or suspect a more significant issue with your water heater, don’t hesitate to contact a professional plumber or rheem customer service for assistance.

Tips For Maintaining Your Rheem Water Heater

Regular maintenance is essential to keep your rheem water heater running efficiently and to extend its lifespan. By following these simple tips, you can ensure that your water heater continues to provide you with hot water whenever you need it.

Flushing The Tank Regularly

Regularly flushing your water heater tank can help remove sediment and mineral buildup, which can affect its performance over time. Here are the key points to remember:

  • Schedule tank flushing at least once a year to prevent sediment buildup.
  • Turn off the power supply or gas valve before flushing the tank.
  • Attach a garden hose to the drain valve and run it to a suitable drainage location.
  • Open the drain valve and allow the tank to completely drain.
  • Close the drain valve and refill the tank before restoring the power or gas supply.

Checking The Anode Rod

The anode rod plays a crucial role in protecting the tank from corrosion. It is necessary to inspect and replace it when required. Consider the following details:

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  • Locate the anode rod on top of your water heater.
  • Remove it using a socket wrench or anode rod removal tool.
  • Check for signs of corrosion or deterioration on the rod’s surface.
  • Replace the anode rod if it is significantly worn or more than 75% depleted.

Insulating The Pipes

Insulating your water heater pipes can help minimize heat loss and reduce energy consumption. Remember the following:

  • Identify the hot and cold water pipes connected to your water heater.
  • Use foam pipe insulation sleeves to wrap each pipe.
  • Secure the insulation with tape or zip ties.
  • Pay extra attention to exposed pipes in unheated areas like basements and crawlspaces.

Performing Routine Maintenance Tasks

Apart from the specific tasks mentioned above, regular maintenance is also necessary to keep your rheem water heater in top shape. Here are some additional routine maintenance tasks to consider:

  • Check the temperature and pressure relief valve annually to ensure it is functioning correctly.
  • Inspect the burner assembly and clean it if necessary, following the manufacturer’s instructions.
  • Inspect the flue baffle for any damage or obstruction and repair or clean as needed.
  • Check for leaks around the water heater and repair them promptly.
  • Keep the area around your water heater clear of debris and combustible materials.

Maintaining your rheem water heater doesn’t have to be complicated. By following these tips and completing these essential maintenance tasks, you can ensure optimal performance and longevity for your water heater. Regular maintenance not only saves you money but also ensures you always have hot water when you need it.


To sum up, restarting a rheem water heater is a relatively simple process that can help resolve common issues and ensure optimal performance. By following the step-by-step instructions provided in this blog post, you can effectively reset your water heater and get it up and running again.

Remember to turn off the power and gas supply before starting the restart process, and always exercise caution when dealing with hot water or electrical components. Regular maintenance and troubleshooting can prolong the lifespan of your rheem water heater and prevent unexpected breakdowns.

If you encounter any difficulties during the restart process or if the issues persist, it is recommended to seek professional assistance. By taking the time to restart your rheem water heater correctly, you can enjoy continuous hot water supply and peace of mind.


I am a mechanical engineer and love doing research on different home and outdoor heating options. When I am not working, I love spending time with my family and friends. I also enjoy blogging about my findings and helping others to find the best heating options for their needs.