What the Rheem Tankless Water Heaters Error Codes Mean, and How to Resolve Them

If you see an error code on your Rheem Tankless Water Heaters appliance, then the chance is you want to call a professional as soon as possible to help tackle the problem. However, sometimes, they can be resolved by yourself.

Rheem provides its customers with digital displays and monitoring mobile apps for some models so you can identify the issue and take the right steps to troubleshoot and find the solution.

Read also: Noritz Tankless Water Heater Error Codes

Below, you are provided with two examples of Rheem Tankless Water Heaters error codes and a guide on how to end the problem.

Rheem Tankless Water Heaters Error Codes

Rheem Tankless Water Heater Error Code 13

Error code 13 on Rheem Tankless Water Heaters means there are problems with a flame rod. There’s a possibility of improper or poor combustion. Here are several ways on how to solve this specific error problem:

  1. Check if the exhaust venting and air intake are installed correctly and working in good order. The exhaust should never recirculate into the clean air intake of your unit.
  2. Observe and get rid of any blockage within the venting.
  3. Check and confirm the location altitude settings.
  4. Inspect the blower motor and Flame Rod FL-24.

Read also: Some Common Noritz Error Code

Rheem Tankless Water Heater Error Code 29

If your unit displays error code 29, the heat exchange temperature is too low. It also may indicate a clogging neutralizer inside the condensing unit. Perform the steps below to resolve this issue:

  1. Clean the heat exchanger’s fins
  2. Clean the screen of the air inlet

If the unit still displays error code 29 even after you have performed the cleaning actions above, then do the following inspections:

  1. Observe if the drain line is blocked and if you have removed the shipping cap.
  2. Check the unit’s inside part and clear ports of condensate drainage.
  3. Check the unit’s outside part and clear the line of condensate drainage.

Most of the troubles with your appliance can be solved by performing a reset action. To do so, press the Rheem tankless water heater reset button. As mentioned above, some models also have mobile app monitoring to install first on your phone. Otherwise, you may refer to the manual book of Rheem heater.

The components need to be shut off before you touch or open them. Touching the wiring or electrical elements while the unit is being turned on may result in electric shock.

It has to be noted that the steps to resolve the problem above are merely for informational purposes. Taking the issues by yourself might bring the risk of nullifying the applicable warranty. If you cannot recognize the error code even after referring to the manual guide or mobile app, consulting a professional is recommended.

A professional or licensed plumber can help you run physical troubleshooting and diagnostic of the unit, regardless of the displayed Rheem Water Heaters error codes. Alternatively, you may reach the company’s technical support team by dialing 1-866-720-2076.

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