How to fix e351 navien?

Alton Alexander
By Alton AlexanderUpdated on June 4th, 2022

The e351 navien error code indicates that there is a problem with the water flow sensor. This sensor is responsible for detecting the flow of water through the pipes and sending a signal to the control panel. If the sensor is not working properly, it can cause the control panel to display an error code. There are a few things that can cause the water flow sensor to fail, including a build-up of dirt and debris, a break in the wire, or a problem with the control panel itself.

People like you are also looking for:

  • navien error code e351
  • e351 navien

1. Replace the entire main board

  1. Remove the front cover.
  2. Remove the four screws that hold the main board in place.
  3. Lift the main board out of the machine.
  4. Replace the main board with a new one.
  5. Replace the four screws that hold the main board in place.
  6. Reinstall the front cover.

2. Replace the pressure sensor

  1. Remove the screws that hold the front panel in place
  2. Remove the front panel
  3. Remove the sensor
  4. Replace the sensor

3. Replace the flow sensor

  1. Open the hood of your car and locate the air intake on the engine.
  2. Locate the flow sensor on the air intake.
  3. Remove the screws that hold the sensor in place.
  4. Remove the sensor.
  5. Clean the sensor and replace the screws.

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

  1. Replace the temperature sensor.
  2. Clean the main board.
  3. Clean the pressure sensor.
  4. Clean the flow sensor.
  5. Clean the temperature sensor.
  6. Check the wiring and connections.
  7. Call a technician.