Home > rinnai code 17

How to fix Rinnai code 17?

Alton Alexander
By Alton AlexanderUpdated on June 4th, 2022

Rinnai code 17 indicates that there is a problem with the water heater's temperature sensor. This error code can occur if the sensor is not properly calibrated, or if there is a build-up of debris on the sensor. If the sensor is not properly calibrated, it can cause the water heater to overheat, which can lead to damage to the unit. If there is a build-up of debris on the sensor, it can cause the sensor to malfunction, which can also lead to the water heater overheating.

You are here because you have a question about:

  • rinnai error code 15
  • rinnai code 17

1. Restart the system

  1. Unplug all devices from the system.
  2. Wait 30 seconds.
  3. Plug in all devices, and turn on the system.
  4. Enter the BIOS.
  5. Select the “Restart” option.
  6. Enter the system reset password.
  7. Select “Yes, restart now.”
  8. The system will restart.

2. Turn off the water heater for at least 5 minutes

  1. Shut off the main water supply to the water heater.
  2. Turn off the power to the water heater.
  3. Open the water heater's access panel.
  4. Disconnect the water heater's drain hose.
  5. Open the water heater's drain valve.
  6. Remove the water heater's cap.
  7. Turn off the water heater's gas valve.
  8. Turn off the water heater's water valve.
  9. Close the water heater's access panel.
  10. Reconnect the water heater's drain hose.
  11. Reconnect the water heater's gas valve.
  12. Reconnect the water heater's water valve.

3. Flush the water heater

  1. Shut off water to water heater.
  2. Remove cover and disconnect hoses.
  3. Turn water back on to water heater and wait three minutes.
  4. Turn off water to water heater.
  5. Remove cover and disconnect hoses.
  6. Turn water back on to water heater and wait three minutes.
  7. Turn off water to water heater.
  8. Remove cover and disconnect hoses.
  9. Turn water back on to water heater and wait three minutes.
  10. Turn off water to water heater.
  11. Remove and clean ignitor.
  12. Install ignitor and reattach hoses.
  13. Turn water back on to water heater and wait three minutes.
  14. Turn off water to water heater.
  15. Replace water heater.

4. Check the gas line for leaks

One way to check for gas leaks is to turn off all the appliances in the home and turn on the main light. Look for any signs of gas escaping – such as flames or sparks – from the appliance. If you see any signs of gas escaping, turn off the main light and call a professional. To check for leaks in a line, you will need a meter. Turn off the main gas line to the home and use the meter to measure the gas pressure in the line. If the pressure is low, there may be a leak in the line. If the pressure is high, the line is probably fine. To fix a leak, you will need to replace the line.

If the answers above didn't work then you should also try:

  1. Check the pressure relief valve.
  2. Check the thermostat.
  3. Check the igniter.
  4. Check the pilot light.