Home Error Code Fix Rinnai Error Code 10: Troubleshoot and Fix in Minutes

Rinnai Error Code 10: Troubleshoot and Fix in Minutes

by Timothy Ginn

Rinnai Error Code 10 indicates a blockage or restriction in the air supply or exhaust system of the Rinnai tankless water heater. Troubleshooting steps should be taken to identify and remove the blockage or restriction.

Understanding Rinnai Error Code 10

Rinnai Error Code 10 is a common issue that occurs in Rinnai tankless water heaters. It is important to have a clear understanding of this error code in order to troubleshoot and fix the problem effectively. In this section, we will delve into what Rinnai Error Code 10 means, how it affects the water heater, and the common symptoms associated with this error code.

What is Rinnai Error Code 10?

Rinnai Error Code 10, also known as the “combustion abnormality,” is an indication that there is an issue with the air intake or exhaust system of the water heater. This error code typically occurs when the air supply or exhaust system is blocked or restricted, disrupting the normal combustion process. It is important to address this issue promptly to ensure the proper functioning of the water heater.

How does Rinnai Error Code 10 affect the water heater?

Rinnai Error Code 10 can have a significant impact on the performance of the water heater. When the air supply or exhaust system is blocked or has restrictions, it can lead to incomplete combustion, reduced efficiency, and even the shutdown of the water heater. Ignoring this error code can result in further damage to the unit and potentially compromise the safety of the household.

Common symptoms of Rinnai Error Code 10

Rinnai Error Code 10 is accompanied by several noticeable symptoms. It is essential to be aware of these symptoms to identify the issue accurately. The common symptoms associated with Rinnai Error Code 10 include:

  • Water heater not producing hot water
  • Frequent shutdowns or error code appearing on the display
  • Unusual noises or vibrations from the water heater
  • Flame flickering or not igniting properly
  • Inconsistent water temperature

If you are experiencing any of these symptoms, it is highly likely that your Rinnai water heater is encountering Error Code 10. In the next section, we will explore some effective troubleshooting steps to resolve this issue.

Troubleshooting Rinnai Error Code 10

Step 1: Check the air intake and exhaust system

Inspect the air intake and exhaust system for any blockages or restrictions that may be causing Error Code 10 on your Rinnai water heater. Clearing out debris or obstructions from the intake and exhaust vents can often resolve this issue.

Step 2: Check for ventilation issues

Ensure proper ventilation for your Rinnai water heater by checking for any factors that may be causing restricted airflow. This could include a lack of ventilation space around the water heater or obstructions near the venting system. By identifying and addressing these ventilation issues, you may be able to resolve Error Code 10.

Step 3: Check for flue blockages

Inspect the flue pipe for any obstructions or blockages that may be causing restricted exhaust flow. Clearing out any debris or buildup in the flue pipe can help alleviate Error Code 10.

Step 4: Check the fan motor

Inspect the fan motor for any issues that may be causing Error Code 10. Clean the fan motor and address any abnormalities or malfunctions that may be contributing to the error code.

Step 5: Resetting the system

If you have completed the previous steps and are still experiencing Error Code 10 on your Rinnai water heater, you may need to reset the system. Safely reset the water heater by following the manufacturer’s instructions. This will typically involve turning off the power, waiting a few minutes, and then turning it back on.

Additional Tips And Maintenance

If you own a Rinnai water heater, it is essential to be familiar with the various error codes it may display. One of the common error codes that users encounter is Error Code 10. This code indicates a problem with the air supply or exhaust system, which can disrupt the normal operation of the water heater. In this section, we will provide you with additional tips and maintenance practices to help you prevent Error Code 10 and ensure the efficient functioning of your Rinnai water heater.

Regular maintenance practices to prevent Error Code 10

  1. Clean the air intake and exhaust vents: Over time, dust, debris, and other particles can accumulate in the vents of your Rinnai water heater, restricting the airflow. Regularly inspect and clean these vents to ensure proper air circulation.
  2. Check the condensate drain: The condensate drain in your water heater can become clogged with dirt and debris. Regularly inspect and clean the condensate drain to prevent any blockages that may lead to Error Code 10.
  3. Inspect the air intake plenum: The air intake plenum is responsible for bringing in fresh air for combustion. Check for any restrictions or blockages in the plenum and remove them if necessary.
  4. Ensure proper gas pressure: Incorrect gas pressure can also cause Error Code 10. Regularly check the gas pressure and ensure it meets the manufacturer’s specifications.

Tips for improving the efficiency of your Rinnai water heater

  • Set the water heater to an appropriate temperature: Higher temperature settings can result in energy wastage. Set your Rinnai water heater to a temperature that meets your needs without excessive energy consumption.
  • Insulate the hot water pipes: Insulating the pipes that transport hot water from the heater to the taps can minimize heat loss and improve the efficiency of your water heater.
  • Consider installing a recirculation pump: A recirculation pump can ensure instant hot water at the taps, reducing the waiting time and minimizing water wastage.
  • Monitor and adjust the thermostat: Keep an eye on the thermostat settings of your water heater and make adjustments as necessary to maintain optimal efficiency.

Professional assistance for complex Rinnai Error Code 10 issues

If you have followed the regular maintenance practices and implemented the efficiency tips mentioned above but are still experiencing Error Code 10, it may be a sign of a more complex issue. In these cases, it is crucial to seek professional assistance. Certified technicians specialized in Rinnai water heaters will have the expertise to diagnose and resolve complex Error Code 10 problems effectively. Avoid attempting complex repairs yourself to prevent further damage or safety hazards.

Frequently Asked Questions Of Rinnai Error Code 10

How Do I Fix Error 10 On Rinnai?

To fix error 10 on Rinnai, try the following steps: 1. Check the air supply and exhaust for blockages or restrictions. 2. Clear any clogged condensate trap. 3. Verify the gas pressure is correct. 4. Inspect the intake plenum for excessive restriction.

5. If the issue persists, consult a professional technician for further assistance. Remember to always ensure proper air, fuel, and ignition for combustion.

What Is The Fault Code 10 On A Rinnai Tankless Water Heater?

Fault code 10 on a Rinnai tankless water heater indicates a potential issue with the air intake or a blocked flue. It could be caused by a clogged air supply or exhaust system, a full condensate trap, or incorrect gas pressure.

Check the burner test point pressure to troubleshoot the error.

What Is Error Code 10 On The Rinnai Reddit?

Error code 10 on the Rinnai reddit indicates an issue with the air intake or a blocked flue. It can also occur if the air supply and exhaust get clogged or if the condensate trap is full. Checking the burner test point pressure and ensuring correct gas pressure may help resolve the error.


If you encounter the Rinnai error code 10, it is crucial to address the issue promptly. This error code is often an indication of a blocked air intake or exhaust system, a full condensate trap, or incorrect gas pressure. Troubleshooting steps such as cleaning the fan, checking for lint or debris, and ensuring proper air supply and exhaust flow can help resolve the error.

If these steps do not solve the problem, it is recommended to seek professional assistance to resolve the issue accurately.

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