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
- Verify that the power source is working.
- Verify that the dehumidifier is plugged into a working outlet.
- If the power source and outlet are both working, check the dehumidifier's power cord.
- 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.
- 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.
- 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
- Open the control panel of hisense dehumidifier and click on the "Settings" tab.
- Check that the " humidity " setting is set to the required level. In most cases, the setting should be in the " high " or " medium " range.
- If the humidity setting is not correct, adjust it until the dehumidifier error code e9 disappears.
- If the dehumidifier error code e9 persists, contact the hisense dehumidifier manufacturer for further assistance.
3. Clean the air filter
- Unplug the dehumidifier.
- Remove the air filter cover.
- Remove the air filter.
- Clean the air filter with a brush.
- Replace the air filter cover.
- Reinstall the air filter.
- Plug in the dehumidifier.
4. Clean the condenser coils
- Remove the condenser cover by unscrewing the two screws in the back.
- Remove the coil by unscrewing the four screws in the middle.
- Clean the coil with a brush and a solution of water and vinegar.
- Dry the coil with a cloth.
- Replace the coil and screw the screws in the back.
- Replace the condenser cover and screw the two screws in the back.
If you didn't find success with an option above, then try:
- Check the evaporator coils.
- Check the drainage system.
- Check for leaks.
- Call a repairman.