How do you fix a hisense dehumidifier error code E9?

Alton Alexander
By Alton AlexanderUpdated on June 4th, 2022

The error code E9 on a Hisense dehumidifier indicates that the unit is not able to properly communicate with the humidity sensor. This can be caused by a number of things, including a faulty sensor, a loose connection, or a problem with the circuit board. If the error code persists, it is recommended that you contact a certified Hisense technician for further assistance.

1. Check the power source and make sure the dehumidifier is plugged into a working outlet

  1. Verify that the power source is working.
  2. Verify that the dehumidifier is plugged into a working outlet.
  3. If the power source and outlet are both working, check the dehumidifier's power cord.
  4. If the power cord is not plugged in securely, the dehumidifier may not be getting power. Try plugging the dehumidifier into a different outlet and check the power again.
  5. If the power is still not working, check the dehumidifier's fuse. If the fuse is not blown, the dehumidifier may have a broken wire or an open circuit.
  6. If the power is still not working, the dehumidifier may need to be replaced.

2. Check the control panel to make sure all the settings are correct

  1. Open the control panel of hisense dehumidifier and click on the "Settings" tab.
  2. Check that the " humidity " setting is set to the required level. In most cases, the setting should be in the " high " or " medium " range.
  3. If the humidity setting is not correct, adjust it until the dehumidifier error code e9 disappears.
  4. If the dehumidifier error code e9 persists, contact the hisense dehumidifier manufacturer for further assistance.

3. Clean the air filter

  1. Unplug the dehumidifier.
  2. Remove the air filter cover.
  3. Remove the air filter.
  4. Clean the air filter with a brush.
  5. Replace the air filter cover.
  6. Reinstall the air filter.
  7. Plug in the dehumidifier.

4. Clean the condenser coils

  1. Remove the condenser cover by unscrewing the two screws in the back.
  2. Remove the coil by unscrewing the four screws in the middle.
  3. Clean the coil with a brush and a solution of water and vinegar.
  4. Dry the coil with a cloth.
  5. Replace the coil and screw the screws in the back.
  6. Replace the condenser cover and screw the two screws in the back.

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

  1. Check the evaporator coils.
  2. Check the drainage system.
  3. Check for leaks.
  4. Call a repairman.