September 11, 2019 | The Water Heater Company

No one wants to have to deal with water heater problems, but sometimes you have to. It’s important that you know how to fix your water heater troubles if you own a Rheem tankless heater. There are lots of problems that can arise and they’ll be displayed in the form of an error code on the screen of the heater. But what do they mean and what should you do about them?

 

We’re going to discuss some of the things you can do to look after your Rheem tankless water heater better. After that, we’ll look at the error codes and what you should do about them when you see them on your water heater’s display, so keep reading to learn more.

 

How to Look After Your Rheem Tankless Water Heater

It’s important to properly maintain your Rheem tankless water heater because doing so will help to keep it in better shape and problems at bay. There are all kinds of problems that can be prevented and delayed through good maintenance. Turning off the water and purging the port valves is an important maintenance task you should complete on your tankless water heater regularly.

 

Completing this process will remove unwanted debris and dirt from the system. Once that part of the process is complete, you can use natural cleaning solutions to clean the tank. Just don’t use any harsh chemicals that would damage the water heater. Once you’ve replaced the relevant valves, simply turn the hot water on slowly to flush air out of the system.

 

Common Problems & Error Codes and How to Fix Them

Error codes can be confusing a little scary when one suddenly displays on the screen of your Rheem tankless water heater. You probably aren’t sure what each error code means or what you should do about it when you notice it. Well, luckily, it is pretty easy to fix most of these errors, but there are some that should be left to professional technicians.

 

To give you a better idea of what each of the most common error codes are about, we’re going to explain them below, as well as give you information on how to fix these problems when they arise.

 

Error Code 00

 

If there’s been continual combustion for more than an hour, this error code will show. That happens because the system isn’t meant to run continuously for that length of time. You can reset the unit to fix the issue and if it happens again, replace the circulation system.

 

Error Code 05

 

When the system is dirty or being blocked by something, it might result in imperfect combustion. Cleaning the heat exchange find could help with that, as well as ensuring good ventilation.

 

Error Code 10

 

This is the error code you’ll see when a false flame is detected. Clean component and proper connections should be ensured and remove any blockages that might be causing the problem.

 

Error Code 12

 

Error Code 12 relates to flame failure which is when the heater can’t maintain a flame. You should check that the system is receiving gas that’s the right pressure and type. Also, check for carbon buildup in the flame rod and bleed excess air from the gas lines.

 

Error Code 15

 

This boiling safety warning should be responded to by fully opening the cold water inlet pipe and the inlet valve. Check for scale that might be blocking the heat exchanger too.

 

Error Code 21

 

This code tells you that there’s been a malfunction in the air intake filter switch. Check the air filter door and the front panel are all secure and installed properly because that’s the most common cause of the problem.

 

Error Code 29

 

When the heat exchanger output temperature is too low, you should clean the air inlet and this should fix the problem relating to this error code.

 

Error Code 34

 

This code tells you that there’s a problem with the combustion air temperature sensor. Check for damage and clean it up to ensure there are no problems. Check the fan blade and motor shaft at the same time too.

 

Error Code 61

 

This error code will appear if the combustion fan simply isn’t turning on properly. The wiring harness and motor should be checked for damaged and make sure that connections are all secure. The fan motor should turn smoothly.

 

When you experience a problem with your Rheem tankless water heater, be sure to refer to the guide above. Those common error codes all represent problems that you can address and fix pretty easily with a basic set of tools and a little time.

 

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