If you have a Rheem water heater, then you have definitely invested in a quality piece of equipment for your home. Rheem supplies a wide variety of commercial and residential hot water heaters, and they are well known for their functionality and quality. But that is not to say that it won’t give you some trouble from time to time.

In this article we’ll look at a few troubleshooting methods for Rheem water heaters, and when you may need to purchase Rheem hot water parts. If you are a water heater repair expert, some of these methods may already be common knowledge to you!

Most Common Problem: Not Enough Hot Water

  • There is nothing more annoying than having a shower or a bath where there is not enough hot water. If you are experiencing this with your Rheem water heater, there are a few things that you can do to troubleshoot the problem, including:
  • Make sure that you have not extended the water usage in your home. Water heaters have a limited capacity and if you exceed this you will have to wait for the heater to recover before you try again.
  • Check the power supply to the heater. The water heater will require a source of energy in order to heat water effectively and if the power supply has been cut off or a fuse has blown, you won’t be getting the hot water supply that you need.
  • Check that your gas lines are clear and that the water heater is receiving sufficient fuel should it be fuel powered.
  • Check the thermostat. This is probably the most important Rheem hot water part. Check that it is not broken, and if it may need some sort of adjusting in order for it to work properly.
  • Check all of your plumbing, and taps, check for leaks and that everything is in good condition.

Initial Checks and Easy Fixes

When troubleshooting Rheem water heaters, start with initial checks. Observe your water usage; excessive use can strain the system. Ensure the power supply is active and stable. For gas heaters, the gas line must be clear and open. Check the thermostat's settings and functionality as it regulates the water temperature. Lastly, inspect all plumbing connections for any signs of leaks.

For more persistent issues, proceed with advanced troubleshooting. Regularly clean and flush the tank to prevent sediment buildup, which affects efficiency. The thermostat is crucial for temperature regulation; reset or replace it if you notice temperature inconsistencies. Electric heaters have heating elements that may burn out and need inspection or replacement. Always test the pressure relief valve, a safety feature preventing excessive pressure build-up.

Troubleshooting requires a blend of simple checks and more detailed steps. Begin with the basics like power supply and water usage. Move on to inspecting gas lines, thermostats, and plumbing. For deeper issues, focus on tank maintenance, thermostat health, heating elements, and pressure valves. Regular maintenance and timely repairs ensure a long-lasting and efficient water heater. Always prioritize safety and consult a professional for complex problems.

When to Call a Professional

Sometimes, issues persist after basic fixes. If problems aren't resolved, call a professional. Look for signs of leaking or damage in your heater. If you see water pooling or parts corroding, it's time. Listen for unusual noises or smells. These could indicate serious issues. A professional can diagnose and repair complex problems safely.

Maintaining Your Rheem Heater

Regular maintenance is key. Schedule inspections annually. A professional can spot and fix issues early. Replace parts as needed. Don't wait for a complete failure. Monitor your heater's performance. Watch for changes in heating speed or water temperature. Regular checks extend your heater's life and ensure safety.

Maintaining your heater and knowing when to call a professional is essential. Handle simple fixes yourself, but don't hesitate to seek help for bigger issues. Regular maintenance prevents unexpected breakdowns and keeps your Rheem heater running efficiently for years. Stay aware of your heater's performance and condition, and enjoy reliable hot water in your home.

Our Rheem Hot Water Parts

Here at Steve’s Appliance Spares, we specialize in selling Rheem hot water parts, as well as a wide variety of other spares to the public and service providers in New Zealand. Our Rheem hot water parts include a variety of hot water cylinders and thermostats. If you are not sure which spare to purchase for your particular hot water heater model, feel free to get in touch with one of our experts.


Troubleshooting your Rheem water heater involves a series of steps, from basic checks to more advanced solutions. Start by managing water usage and ensuring proper power and fuel supply. Inspect the thermostat and plumbing regularly. If problems persist, don't hesitate to call a professional. Regular maintenance and understanding when to seek expert help are key to the longevity and efficiency of your heater.

For parts and expert advice, visit Steve's Appliance Spares. We offer a wide range of Rheem hot water parts and other spares. Our experts are ready to assist you in finding the right parts for your heater. Browse our selection and keep your Rheem heater running smoothly. Reach out to us for any queries or needs. Your comfort and satisfaction are our priority! Browse our Rheem hot water parts on our website. We’re sure that you’ll find what you’re looking for!