Rinnai Error Code 12

If you’re seeing Rinnai error code 12 on your gas space heater or hot water unit, it indicates a flame failure.

This means the system hasn’t detected a flame in the burner box. This error can be tricky to resolve on your own, particularly if there are underlying issues with your unit.

Common Causes of Error Code 12

There are several reasons why your Rinnai unit might display this error code. Some of the usual suspects include:

• Incorrect gas pressure supply to your hot water unit or heater
• Loose gas connections and fittings
• Incorrect venting material for your specific unit
• Debris and dirt clogging the gas burner
• Debris and dirt clogging the fan blower
• Moisture in the tubing connecting the gas combustion chamber to the gas valve (for internal units only)
• Damage to the flame rod protective sleeve
• Damaged flame rod wires

Steps to Solve Error Code 12

1. Check Gas Connections and Pressure: Begin by checking the gas connections and ensuring the gas pressure is adequate. Make sure the gas valve is open and the pilot light isn’t out due to a lack of gas. If the gas pressure is insufficient, it may require the attention of a qualified gas fitter to correct.
2. Clear Debris: Inspect the gas burner and fan blower for any debris or dirt. Clean these components carefully to ensure they are not blocked, which could prevent proper functioning.
3. Ensure Proper Ventilation: Verify that the correct venting material is installed and that there is no blockage. Proper ventilation is essential for maintaining a steady flame.
4. Check for Moisture: For internal units, check the tubing connecting the gas combustion chamber to the gas valve for moisture. Moisture can disrupt the operation of the system.
5. Inspect the Flame Rod: Examine the flame rod and its protective sleeve for any damage. Also, check the flame rod wires. Any damage here can cause the system to fail in recognising the flame.
6. Reset the System: Sometimes, a simple reset can solve the problem. Turn off the power to the heater or hot water unit, wait a few minutes, and then turn it back on.

When to Call a Professional

If these steps do not resolve the issue, it’s best to contact a professional. Rinnai hot water systems and gas space heaters can be complex, and a licensed technician like Lowes Gas Solutions will have the expertise to diagnose and repair the problem safely and effectively.

Preventative Maintenance

Regular maintenance is crucial to avoid future errors. Schedule annual check-ups for your heating and hot water systems to ensure everything is functioning properly. This can help catch potential issues before they become major problems.