Samsung Air Conditioner Error Codes [Explained]

Like many other electronic devices, Samsung air conditioners have sensors designed to identify and diagnose faults promptly. These sensors detect anomalies as they occur and present them as error codes, facilitating the troubleshooting process.

When a Samsung air conditioner displays an error code, it typically ceases operation until the underlying fault is addressed.

Some of these error codes, such as CL (Auto-Clean Indicator), CF (Filter-Cleaning Reminder), and CF (Automatic Defrost), are relatively minor and require routine maintenance. On the other hand, error codes like E3 (Indoor Fan Motor Malfunction) and E101 (Failed Communication) often indicate more significant issues that necessitate professional technical assistance.

The Samsung air conditioner has many intricate parts that need to work together smoothly to function properly. When an error code shows up, it’s like the AC trying to tell you something important, and you need to take quick action to fix the problem.

Here is a quick guide to common Samsung Air Conditioner Error Codes, its cause and quick fixes,

Error Code	Meaning	Cause	Quick Fix
CL	Auto-Clean indicator	Indoor unit Producing Odor	Run the “Auto-Clean’ command to eliminate the odor
CF	Reminder for Filter cleaning/reset	Cloged Filter	Clean or Replace the filter
DF	Automatic Defrost	Defrosting in progress	Wait for the Auto Defrost to complete
E3	Indoor fan motor malfunction	Faulty indoor fan or circuit board	Replace the indoor fan or circuit board,
E4	Forced Defrost	Low refrigerant, faulty pump, broken temp sensor, or pressure fluctuation	Contact Samsung service center
E5	Open/short indoor heat exchanger sensor	Faulty outdoor heat exchanger sensor	Replace the indoor heat exchanger sensor
E6	Open/short outdoor heat exchanger sensor	Faulty outdoor heat exchanger sensor	Replace the heater temperature sensor
E7	Open/short heater temp sensor	Faulty heater temperature sensor	Replace the heater temperature sensor
E8	High/Low Voltage	Electrical voltage fluctuations	Ensure stable electrical supply or consult an electrician
E9	Compressor Overload	Excessive load on the compressor	Reduce the load or consult a technician for compressor che
C2	Indoor pipe sensor fault	Faulty indoor pipe sensor	Replace the indoor pipe sensor
E101	Nocommunication (indoor unit)	Faulty connections	Check for any loose connections or power cables and fix them
E102	No communication (outdoor unit)	Faulty connections	Check for any loose connections or power cables and fix them
EL	Overheated electrical heater	Power surge	May need Replacement of the heater temperature sensor or PCB
E201	Failed communication (between indoor and outdoor units)	Loose connections or faulty PCB	Check for loose connections, if none, replace the main PCB
E1/21	Faulty Room temperature sensor	Defective room temperature sensor	Contact Samsung service center
E1/22	Faulty Heat exchange temperature-sensor	Malfunctioning heat exchanger temp sensor	Contact Samsung service center
E1/54	Bad fan capacitor or motor	–	Replace the capacitor or the motor
E1/63	Bad EEPROM	–	Replace the EEPROM

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Most Common Samsung Air Conditioner Error Codes

Now that we have discussed briefly the Samsung air conditioner error codes, let’s jump into individual codes and fixes,

1. Samsung Air Conditioner Error Code CL (Auto Clean)

Error Code CL indicates that your Samsung air conditioner’s Auto-clean function is active.

This feature is specifically designed to maintain the cleanliness of the indoor unit’s heat exchanger (evaporator) and reduce the growth of mold and bacteria on the coil surfaces, promoting a healthier and more efficient cooling experience.

The self-cleaning mode, Auto-clean, enhances efficiency and ensures cleaner air within your environment. During this mode, you may observe changes in fan speed. Once the cleaning process is complete, the air conditioner will return to its normal operation.

Quick Fix

When Error Code CL appears, there’s no need to perform any troubleshooting steps or contact a technician. Just let the Air conditioner clean itself.

2. Samsung Air Conditioner Error Code CF (Filter Cleaning)

The air filter in an air conditioner is responsible for trapping dust, particles, and pollutants from the air. Over time, it can become clogged with debris, reducing the unit’s efficiency.

Error Code CF is triggered when the air conditioner’s internal sensors detect that the air filter is dirty and requires cleaning or replacement.

Quick Fix

Turn off and unplug the AC for safety.
Locate the filter behind the indoor unit’s cover.
Remove and inspect the filter; if it is dirty, clean or replace it.
If it needs cleaning, gently vacuum or rinse it with mild soap and water. Let it dry completely.
Replace them with the correct type and size for severely damaged or uncleanable filters.
Reinsert the filter and secure the cover.
Plug the AC back in and turn it on.

3. Samsung Air Conditioner Error Code DF (Automatic Defrost)

Error Code DF indicates that the air conditioner is in automatic defrost mode.

Automatic defrost mode is a normal operation that occurs when the outdoor unit detects ice buildup on the coils.

Quick Fix

No action is needed.
The AC is defrosting the coils to maintain efficiency.
It switches to heating mode temporarily.
It will resume cooling once defrosting is done.

4. Samsung Air Conditioner Error Code E3 (Indoor Fan Motor Fault)

Error Code E3 indicates that there is a problem with the indoor fan motor of the air conditioner.

The indoor fan motor is responsible for circulating air through the indoor unit, and any fault in this component can disrupt the cooling or heating process.

Quick Fix

Contact a qualified technician.
They will assess, diagnose, repair, or replace the faulty fan motor.
DIY attempts can be dangerous and may worsen the problem.
Professional service ensures proper airflow, efficient cooling or heating and prevents further issues.

5. Samsung AC Error Code E4 (Forced Defrost Mode)

Error Code E4 means the air conditioning system is actively in a forced defrost mode.

Low refrigerant levels, a malfunctioning heat pump, a faulty temperature sensor, or extreme temperature conditions can initiate forced defrost mode.

Quick Fix

To resolve this error, you should address the root cause, which may involve fixing refrigerant leaks, repairing the heat pump, replacing a faulty temperature sensor, or improving the system’s performance in extreme weather conditions.

You will need to seek the assistance of a qualified HVAC technician to diagnose and rectify these problems to ensure your air conditioning system operates efficiently.

6. Samsung AC Error Code E5 (Faulty Indoor Heat Exchanger Sensor)

Error Code E5 signifies a problem with the indoor heat exchanger sensor within the air conditioner. The indoor heat exchanger sensor is responsible for monitoring and regulating the temperature of the indoor unit.

Quick Fix

Contact a qualified HVAC technician. They will diagnose the sensor issue and replace it for proper temperature control.

DIY attempts can be risky and may cause more problems. Professional service ensures reliable operation without sensor-related issues.

7. Samsung Air Conditioner Error Code E6 (Faulty Outdoor Heat Exchanger Sensor)

Error Code E6 signifies a problem with the outdoor heat exchanger sensor within the air conditioner.

The outdoor heat exchanger sensor is responsible for monitoring and regulating the temperature of the outdoor unit.

Quick Fix

If you encounter Error Code E6, promptly address it to maintain your air conditioner’s proper functioning.

Contact an HVAC technician for a solution. They’ll inspect and replace the faulty outdoor heat exchanger sensor, ensuring efficient temperature control.

8. Samsung Air Conditioner Error Code E7 (Faulty Heater Temperature Sensor)

The outdoor heat exchanger sensor monitors the outdoor temperature and communicates with the air conditioner to regulate its operation effectively.

Quick Fix

Contact a qualified HVAC technician or professional air conditioner repair service. They will inspect the unit, diagnose the faulty outdoor heat exchanger sensor, and replace it to restore proper temperature control.

9. Samsung Air Conditioner Error Code E8 (High/Low Voltage)

Error Code E8 signifies that there is an issue with the voltage supplied to the air conditioner unit.

This problem can manifest as either excessively high or low voltage. This causes the compressor to enter safe mode and shut off the AC.

Quick Fix

Check Power Supply: Examine the power supply for secure connections and any damage.
Voltage Levels: Ensure voltage falls within specified ranges. High or low voltage can affect the air conditioner. If you are frequently encountering this issue, use a voltage stabiliser.
Contact an Electrician: Alternatively, you should consult a qualified electrician if other houses nearby are not facing the same issue. The electrician will inspect and fix wiring, replace damaged parts, or install stabilizing equipment.

10. Samsung Air Conditioner Error Code E9 (Compressor Overload)

Error Code E9 occurs when the air conditioner’s compressor experiences an overload, which means it’s working beyond its designed capacity or is under excessive stress.

This can happen due to various factors, such as a clogged air filter, improper refrigerant levels, or a malfunctioning component in the system.

Quick Fix

Turn Off the Unit: Power off the air conditioner to allow it to cool down and relieve compressor strain.
Check for Clogs and Maintenance: While off, inspect and clean or replace the air filter and ensure clean coils. Clogs can make the compressor work harder.
Refrigerant Levels: If the problem persists, contact an HVAC technician to check refrigerant levels. Inappropriate levels can overload the compressor.
Compressor Inspection: If the issue persists, the technician will inspect the compressor for faults or maintenance needs.

11. Samsung AC Error Code E101 (Indoor Unit No-communication)

Error Code E101 occurs when there is a breakdown in communication between the indoor units of the air conditioning system.

This communication is essential for coordinating and synchronizing the operation of indoor and outdoor units.

Quick Fix

Check Wiring and Connections: Inspect the wiring and connections between the indoor unit. Look for loose or damaged wires, disconnected cables, or any other issues disrupting the communication.
Professional Service: If you cannot identify and rectify the problem with the wiring and connections, it’s advisable to seek professional service. Contact an HVAC technician with expertise in air conditioner repairs.

12. Samsung AC Error Code E102 (Outdoor Unit No-communication)

Error Code E102 occurs when communication breakdown occurs between the outdoor units of a multi-split or multi-zone air conditioning system.

The outdoor units typically work together to manage the cooling or heating load for different zones or rooms. When communication between these units fails, it disrupts the coordinated operation of the system.

Quick Fix

Check Wiring and Connections: Look at the wires and connections between the outdoor units. Make sure everything is connected properly and not damaged.
Reset the System: Sometimes, turning off the outdoor units for a few minutes and then turning them back on can fix the problem.
Call a Technician: If checking the wires and resetting doesn’t work, it’s best to call a professional technician who knows about air conditioners.

13. Samsung AC Error Code EL (Overheated electrical heater)

Error Code EL is triggered when the electrical heater within the air conditioner becomes excessively hot.

The electrical heater is used in some air conditioning systems to provide supplemental heating during cold weather or assist in defrosting the system. Overheating of this component can occur due to several reasons.

It can overheat due to:

Blocked Airflow: If the air filter is clogged, air can’t move properly, leading to overheating.
Faulty Heater Element: The heater itself might have a problem, making it produce too much heat.
Wiring Problems: Damaged wires connected to the heater can cause electrical issues and overheating.

Quick Fix,

Let It Cool: If you see Error Code EL, turn off the air conditioner and let it cool down. Overheating can be dangerous, so don’t ignore it.
Check Airflow: Make sure the air filter is clean. A clean filter helps air flow better and prevents overheating. Ensure that vents and air passages are not blocked, allowing air to circulate freely.
Get Professional Help: If the problem continues, contact a technician who knows about air conditioners. They will inspect the heater and wires to find out what’s wrong and fix it for you.

14. Samsung AC Error Code E201 (Failed communication between indoor and outdoor units)

Error Code E201 occurs when there is a failure in the communication between your air conditioner’s indoor and outdoor units.

These units work together to control the cooling or heating of your space. When they can’t communicate properly, it disrupts their coordinated operation.

Quick fix,

Look for loose wires, disconnected cables, or damaged wiring between the indoor and outdoor units. Ensure all connections are secure without signs of corrosion or damage.

Turn off indoor and outdoor unit power for a few minutes, then turn them back on to see if the error disappears.

If the issue persists, consult a qualified HVAC technician. They’ll diagnose the problem using specialized tools and fix any communication-related components, like control boards or sensors, to restore proper communication between the units.

15. Samsung AC Error Code E1/21 (Faulty Room temperature sensor)

Error Code E1/21 occurs when the room temperature sensor, responsible for measuring and regulating the temperature in your living space, malfunctions or provides inaccurate readings.

When this sensor doesn’t work correctly, it can affect your air conditioner’s ability to maintain the desired room temperature.

Quick Fix,

When you encounter Error Code E1/21, contact a skilled HVAC technician or air conditioning service. They’ll check the room temperature sensor for issues and use their expertise and tools to diagnose it.

If the sensor is faulty, they’ll replace it with a new one. Afterwards, they’ll ensure it’s calibrated correctly to provide accurate temperature readings and dependable control.

16. Samsung AC Error Code E1/22 (Faulty Heat exchange temperature-sensor )

Error Code E1/22 occurs when there is a problem with the heat exchange temperature sensor. This sensor monitors and regulates the temperature within the air conditioner’s heat exchange process.

Quick Fix,

If you encounter Error Code E1/22, contact a skilled HVAC technician or an air conditioning service provider.

The technician will examine the heat exchange temperature sensor to identify faults or problems. They possess the necessary skills and specialized tools for precise diagnosis.

In case of a malfunctioning sensor, they will replace it with a functional one.

17. Samsung Air Conditioner Error Code E1/54 (Bad fan capacitor or motor)

The error code E1/54 occurs when there is an issue with the fan capacitor or the motor.

The fan capacitor is responsible for providing the initial electrical boost to start the motor, and the motor, in turn, powers the fan that circulates air within the unit. If either of these components fails or malfunctions, it can lead to this error code.

Quick Fix,

Call a technician who will assess the fan capacitor and motor to identify the problem. If either is found faulty, they will replace it by disconnecting the power, removing the defective part, and installing a new one.

Finally, they’ll test the AC to ensure proper function, checking for error code E1/54 removal and smooth fan operation.

18. Samsung Air Conditioner Error Code E1/63 (Bad EEPROM)

This error code, E1/63, signals an issue with the EEPROM (Electrically Erasable Programmable Read-Only Memory) in your Samsung air conditioner.

The EEPROM is crucial for storing essential information and air conditioner settings.

Quick Fix,

Contact a qualified HVAC technician or an authorized Samsung service provider to resolve this issue. Here’s what they’ll do:

Diagnosis: The technician will diagnose the AC using specialised tools to confirm the EEPROM problem.
Replacement: If the EEPROM is faulty, they’ll replace it, which involves disconnecting power, removing the defective EEPROM, and installing a new one. This requires technical expertise due to the EEPROM’s critical role.
Programming: After EEPROM replacement, the technician will program it with the necessary data and settings to restore normal AC function.
Testing: They’ll thoroughly test the AC to ensure it functions correctly, resolving error code E1/63.