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How to fix an E8 error code on an air conditioner?

Alton Alexander
By Alton AlexanderUpdated on June 4th, 2022

The E8 error code on an air conditioner indicates that the unit is not cooling properly. There are a few things that could be causing this:

  1. The air filter could be dirty and needs to be replaced.

  2. The coils inside the unit could be dirty and need to be cleaned.

  3. The refrigerant level could be low and needs to be refilled.

  4. The thermostat could be set incorrectly and needs to be adjusted.

If the air conditioner is still not cooling properly after taking these steps, then it will need to be serviced by a professional.

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1. Check the air conditioner's filters and clean or replace them if necessary

To check the air conditioner's filters and clean or replace them if necessary:

  1. Open the hood of the air conditioner and locate the filters.
  2. Locate the filter cover and remove it.
  3. Inspect the filter for damage, dirt, or other objects. If necessary, replace the filter.
  4. Reinstall the filter cover and close the hood.

2. Inspect the air conditioner's coils and clean them if they are dirty

  1. Open the air conditioner and remove the cover.
  2. Look for dirt, dust, or other debris on the coils. If there is a lot of debris, you will need to clean them.
  3. Use a vacuum cleaner to clean the coils. Make sure to use the correct attachment for the air conditioner.
  4. If the coils are still dirty, you will need to replace them.

3. Make sure the air conditioner's blower is working properly

In order to make sure the air conditioner's blower is working properly, you'll need to check the air filter, the blower motor, and the power supply. To check the air filter, turn off the power to the AC unit and remove the filter. If the filter is dirty, replace it. To check the blower motor, turn on the power to the AC unit and press the button to turn on the blower. If the blower motor is working, the light should turn on. If the light does not turn on, the blower motor may be broken and should be replaced. To check the power supply, turn on the power to the AC unit and wait a few minutes for the unit to cool down. If the power supply is working, the unit should turn off when the power is turned off. If the unit does not turn off, the power supply may be broken and should be replaced.

4. Inspect the air conditioner's ductwork and repair or replace it if necessary

The first step in inspecting the air conditioner's ductwork is to check for any obstructions. If there are any obstructions, the ductwork must be cleaned and the obstruction removed. Next, the ductwork must be inspected for damage. If there is damage, the ductwork must be repaired or replaced.

5. Have a professional service the air conditioner

  1. Open the windows to allow fresh air into the room.
  2. Turn off the power to the air conditioner.
  3. Remove the cover on the unit.
  4. Locate the fan unit.
  5. Disconnect the power cord from the fan unit.
  6. Remove the fan unit from the unit.
  7. Clean the fan unit and the unit housing.
  8. Replace the fan unit.
  9. Reinstall the cover.
  10. Connect the power cord to the fan unit and the unit housing.