Hyundai – Error Code F9

Hyundai – Error Code F9

Is your Hyundai air conditioner showing up with Error Code F9 on the screen?

What is a Hyundai Error Code F9?

The Error Code F9 on your Hyundai air conditioner indicates a problem with the sensor that measures the temperature of the air coming out of the compressor. This sensor is crucial because it helps ensure that the air conditioner is working efficiently and safely by monitoring if the air is too hot. If this sensor isn’t working right, it could lead to the air conditioner not cooling properly or even damaging the system.

Recommended solution/fix steps

To fix this issue, you can follow these steps:

1. Power Off: First, make sure to turn off your air conditioner completely to ensure safety.
2. Locate the Sensor: Find the compressor discharge temperature sensor, which is usually attached to the compressor or nearby piping.
3. Inspect for Damage: Check the sensor and its wiring for any visible signs of damage like cuts or burns. If you see any damage, the sensor might need to be replaced.
4. Clean the Sensor: Sometimes, dust or dirt can interfere with the sensor’s function. Gently clean it with a soft brush or cloth.
5. Check Connections: Make sure all the wires connected to the sensor are secure and not loose.
6. Reset the Air Conditioner: After checking and fixing any issues, turn the power back on and reset the air conditioner by following the manufacturer’s instructions, which might involve pressing a reset button or unplugging the unit for a few minutes.
7. Test the AC: Finally, turn on the air conditioner to see if it’s working properly without the F9 error showing up.

If the error persists even after you’ve tried these steps, it might be best to contact a professional technician for help, as the issue could be more complex and require specialized tools or parts to fix.

Troubleshooting to try

• Check for a dirty air filter
• Check your thermostat settings
• Check your air conditioner circuit breakers
• Check your outdoor unit
• Check all air vents

How to restart/reset/reboot your Hyundai air conditioner?

You may find your Hyundai air conditioning unit needs resetting if it starts to malfunction or isn’t responding to any input via your control panel or remote control. Resetting your air conditioner re-starts the internal computer and can often restore the unit to normal working order. The exact instructions will vary depending on your model of Hyundai air conditioner.

Typically, this procedure will be:

1. Turn off the air conditioning unit on your thermostat
2. Power off your air conditioning unit
3. Locate the reset button
4. Press the reset button for 5 seconds
5. Turn your air conditioning on using the thermostat

Hyundai Maintenance

Periodic maintenance is essential for keeping your air conditioner running efficiently.

Before carrying out any maintenance, disconnect the power supply by taking the plug out from the socket.

Indoor Unit – Antidust Filter

1. Open the front panel
2. Keeping the front panel raised with one hand, take out the air filter with the other hand
3. Clean the filter with water; if the filter is soiled with oil, it can be washed with warm water (not exceeding 45°C). Leave to dry in a cool and dry place.
4. Keeping the front panel raised with one hand, insert the air filter with the other hand
5. Close

The electrostatic and the deodorant filter (if installed) cannot be washed or regenerated and must be replaced with new filters after every 6 months.

Cleaning the heat exchanger

1. Open the front panel of the unit and move it until it is opened fully, then, unhook the hinges to make the cleaning easier.
2. Clean the indoor unit using a cloth with water (not higher than 40 C) and neutral soap. Never use aggressive solvents or detergents.
3. If the outdoor unit is clogged, remove the leaves and the waste and remove the dust with an air-jet or a bit of water.

End-of-season maintenance

• Disconnect the automatic switch or the plug.
• Clean and replace the filters
• On a sunny day let the conditioner work in ventilation for some hours, so that the inside of the unit can dry completely.

Replacing the batteries

When:

• There is no confirmation beep heard from the indoor unit.
• The LCD doesn’t act.

How: 

• Take off the cover at back.
• Place the new batteries respecting the symbols + and -.

N.B: Use only new batteries. Remove the batteries from the remote controller when the conditioner is not in operation

WARNING! Do not throw batteries into common rubbish, they should be disposed of in the special containers situated at the collection points.