How to fix Rinnai error code 11?

Alton Alexander
By Alton AlexanderUpdated on June 4th, 2022

Rinnai error code 11 is a code that indicates a problem with the gas supply to the appliance. This can happen if the gas supply is turned off or if there is a blockage in the gas line.

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  • rinnai error code 11 fix
  • rinnai error code 11

1. Check the gas line for leaks

  1. Remove the cover over the gas line.
  2. Look for any cracks or leaks in the line. If there are, fix them with a sealant.
  3. Use a gas detector to check for any gas leaks. If there are any, fix them.

2. Check the igniter for proper operation

  1. Inspect the electrodes for cracks, burnt areas, or dirt. If any of these conditions exist, the igniter will need to be replaced.
  2. Check the wire connections to the igniter. Make sure that the wires are secure and that there are no breaks or kinks.
  3. Inspect the igniter for signs of overheating, such as melted plastic or scorching wires. If the igniter is overheating, it will need to be replaced.
  4. Check the voltage at the igniter's power supply. If the voltage is low, the igniter may need to be replaced.

3. Check the thermocouple for proper operation

  1. Verify that the thermocouple cable is correctly inserted into the connector on the heat exchanger.
  2. Verify that all electrical connections are secure.
  3. Check the thermocouple for proper operation. If it does not appear to be reading accurately, replace the thermocouple.

If you didn't find success with an option above, then try:

  1. Check the gas control valve for proper operation.
  2. Clean the burner assembly.
  3. Inspect the flue for blockages.
  4. Check for proper ventilation.
  5. Have the unit serviced by a qualified technician.