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How to fix E1 error code?

Alton Alexander
By Alton AlexanderUpdated on June 4th, 2022

The E1 error code indicates that there is a problem with the electronic control board. This error code is usually caused by a failed component on the control board, a loose wire connection, or a problem with the software.

1. Replace the thermocouple

  1. Remove the air filter.
  2. Remove the thermostat housing by unscrewing the four bolts.
  3. Remove the two thermocouple connectors.
  4. Remove the thermocouple.
  5. Clean the surface where the thermocouple was located.
  6. Install the new thermocouple in the same location.
  7. Replace the thermostat housing by screwing the four bolts.
  8. Replace the air filter.

2. Clean or replace the igniter

  1. Determine the issue with the igniter.
  2. If the igniter is not the issue, then clean the area around the igniter.
  3. If the igniter is the issue, then replace the igniter.

3. Clean or replace the flame sensor

  1. Turn off the engine and disconnect the negative battery cable.
  2. Remove the air cleaner assembly.
  3. Remove the flame sensor.
  4. Clean the area around the flame sensor with a damp cloth.
  5. Install the flame sensor and connect the negative battery cable.
  6. Turn on the engine and check the error code.

4. Check for blockages in the venting system

The steps to check for blockages in the venting system in order to fix e1 error code would include inspecting the system for any obstructions, such as plugs, debris, or fur, and removing any obstructions if found. The system would also be inspected for any leaks, which would be identified by the presence of water or gas on the floor, in the walls, or in the ductwork. If any blockages or leaks are found, they would be fixed using a venting system repair specialist.

Some users might also have success with the following opitons:

  1. Check the wiring and connections.
  2. Replace the control board.