Samsung Dryer Error Codes (Simple Guide)

Samsung dryers display error codes when something is preventing the appliance from heating, tumbling, sensing moisture correctly, or communicating between components. These codes help quickly narrow down the faulty part.

This guide is designed to help you understand what those error codes mean and empower you to tackle some of these problems, potentially saving you time and the cost of a service call.

Samsung Dryer Error Codes: Your Guide to Troubleshooting

Samsung dryers use specific error codes to indicate different problems. Identifying the code is the crucial first step in diagnosing the issue. Once you have the code, refer to the list below to understand its meaning and the possible causes and solutions.

tC / tE / tC1: Thermistor 1 Error (Resistance too low or too high)

These codes often relate to issues with the dryer’s heating system or temperature sensors (thermistors).

• Meaning: The main thermistor (Thermistor 1) which monitors the air temperature in the dryer drum, is not reading correctly.
• Possible Causes: Clogged lint screen, restricted vent system, faulty thermistor, and damaged thermistor wiring harness.
• Solutions:
  • Clean the lint screen thoroughly before every load.
  • Check and clear your dryer’s vent system for any blockages. A restricted vent is a very common cause of heating issues and error codes.
  • Inspect the thermistor and its wiring harness for any visible damage.
  • For advanced users: You can check the resistance of the vent thermistor 1 using a multimeter. At 25°C (77°F), the expected resistance is around 10 KΩ.

tC5: Thermistor 2 Error (Resistance too low or too high) – For Standard Vented Dryers

• Meaning: The secondary thermistor (Thermistor 2), often located in the exhaust, is reporting a resistance value outside the expected range.
• Possible Causes: Clogged lint screen, restricted vent system, faulty thermistor, and damaged thermistor wiring harness.
• Solutions:
  • Clean the lint screen.
  • Check for restrictions in the vent system.
  • Inspect the sensor bar resistance. (Note: The provided resistance values seem inconsistent and may require clarification from a service manual. A general check for cleanliness and intactness is recommended.)
  • Check the vent thermistor 2 resistance. At 25°C (77°F), the expected resistance is around 240 KΩ.
  • Check for a damaged or torn thermistor harness.

tC5: Compressor Temp Sensor Error—For Ventless or Heat Pump Dryers

• Meaning: The temperature sensor monitoring the compressor is reporting an issue.
• Possible Causes: The compressor thermistor resistance is out of range.
• Solutions:
  • Check the compressor temperature sensor resistance. At 24°C (75°F), the expected resistance is around 50 KΩ.
  • Check the thermistor voltage at the main control board (approximately 5 volts DC).

tC: Vent Sensor Error – For Ventless or Heat Pump Dryers

• Meaning: The thermistor in the vent system of a ventless or heat pump dryer has a resistance value outside the normal range.
• Possible Causes: Vent thermistor resistance is out of range.
• Solutions:
  • Check the vent sensor resistance. At 26°C (79°F), the expected resistance is around 50 KΩ.
  • Check the thermistor voltage at the main control board (approximately 5 volts DC).
  • Clean the case filter (this may be specific to certain ventless models).

HC: Overheating Error – For Standard Vented Dryers

• Meaning: The dryer has detected an abnormally high temperature. This is a safety feature to prevent fires.
• Possible Causes: Invalid heating temperature during operation, thermistor resistance is out of range, clogged lint screen, restricted vent system.
• Solutions:
  • Clean the lint screen thoroughly.
  • Check and clear the vent system for any obstructions.
  • Check the vent thermistor resistance (expected 10 KΩ at 25°C/77°F).
  • Check for a damaged thermistor harness.
  • Allow the dryer to cool down before attempting to run it again.

HC: Compressor Overheat – For Ventless or Heat Pump Dryers

• Meaning: The compressor in the heat pump system has overheated.
• Possible Causes: Dirty condenser coils, clogged evaporator coils, compressor temperature thermistor resistance out of range, faulty DC fan motor, or issue with the sealed refrigerant system.
• Solutions:
  • Clean the evaporator and/or condenser coils. This often requires accessing internal components and may be best left to a technician.
  • Check the compressor temperature sensor resistance (expected 50 KΩ at 24°C/75°F).
  • Check the main PCB for the sensor pin voltage (approximately 5VDC).
  • Check the DC fan motor condition and the main PCB for the fan pin voltage (expected 12 VDC).
  • Check the compressor winding resistance and capacitor.
  • Issues with the sealed system (like Freon leakage or clogged capillaries) require a certified technician.

3C / 3C1 / 3C2 / 3C3 / 3C4 / 3C5 / 3C6 / 3C7 / 3C8: BLDC Drum Motor Error

These codes indicate problems with the dryer’s motor or the drum’s rotation.

• Meaning: There is an issue with the Brushless DC (BLDC) drum motor or its control system.
• Possible Causes: Incorrect connections to the BLDC motor, a faulty BLDC motor, a faulty inverter board (controls the BLDC motor), a faulty main control board, or overloading the dryer.
• Solutions:
  • Check all connector terminals and contacts on the motor and control boards for secure connections.
  • Ensure the drum motor power cable and connector are properly connected.
  • For advanced users: Check the BLDC motor resistance (expected 5 Ω between U, V, and W terminals).
  • Reduce the size of the laundry load to prevent overloading (3C1 specifically relates to overloading).
  • Check if the motor or the motor belt is damaged.

5C: Overflow Error – For Ventless or Heat Pump Dryers

This code is specific to ventless and heat pump dryer models that collect water.

• Meaning: The dryer’s water collection system has detected an overflow.
• Possible Causes: Faulty wire harness, faulty float sensor (detects water level), faulty drain pump motor, or clogged drain hose or filter.
• Solutions:
  • Check the wire harness connectors related to the drainage system.
  • Check if the float sensor circuit is open or shorted.
  • For advanced users: Check the drain pump resistance (expected 370 Ω).
  • Inspect and clear the drain hose and any accessible filters in the drainage system.

bC2: Button Error

These codes relate to issues with the control panel or buttons.

• Meaning: A button on the control panel is detected as being continuously pressed.
• Possible Causes: A stuck key, moisture, or damage to the control panel.
• Solutions:
  • Check if any buttons are physically stuck and try to gently free them.
  • Inspect the user interface and/or control panel PCB (Printed Circuit Board) for any looseness, shorts, moisture, or visible damage. Ensure it is properly seated.

dC / dF: Door Open Error

These codes indicate a problem with the dryer door or its sensor.

• Meaning: The dryer’s control system detects that the door is open or not securely latched, preventing the cycle from starting or continuing.
• Possible Causes: The door is not fully closed, the door latch is not engaging correctly, the door switch is defective, or the door switch wiring harness is damaged.
• Solutions:
  • Ensure the dryer door is completely closed and latched. Sometimes simply opening and firmly closing the door again can resolve this.
  • Check the door and the door opening for any items of clothing or other obstructions preventing the door from closing properly.
  • Check if the door switch is defective or loose.
  • For advanced users: You can check the continuity of the door switch terminals with a multimeter.
    • Door Open: Continuity between COM and NC, no continuity between COM and NO.
    • Door Closed: No continuity between COM and NC; continuity between COM and NO.
  • Check for a damaged or torn door switch wiring harness.

FC: Power Frequency or Installation Fail Error

These codes point to issues with the electrical power being supplied to the dryer.

• Meaning: The dryer is detecting an invalid power source frequency or there is an electronic control problem related to voltage.
• Possible Causes: Invalid power source frequency (e.g., connecting the dryer to an incompatible power supply), electronic control board issue (invalid voltage reading).
• Solutions:
  • Verify that the dryer is connected to a power source with the correct frequency (usually 50Hz or 60Hz depending on your region and the dryer’s specifications).
  • For advanced users: Check the power frequency sensor circuit.
  • Check the voltage at the dryer outlet using a multimeter.
    • L1 and L2: ~240 Vac (60 Hz in North America)
    • L1 and NEUTRAL: ~120 Vac (60 Hz in North America)
    • L2 and NEUTRAL: ~120 Vac (60 Hz in North America)
    • L1 and Ground: ~120 Vac (60 Hz in North America)

9C / 9E / 9C1 / 9E1 / 9C2: Invalid Power Source Error

• Meaning: The voltage supplied to the dryer is outside the acceptable range (specifically, the voltage between L1 and L2 is below 180 VAC for a sustained period).
• Possible Causes: Loose or incorrect power cord connection, issue with the household electrical supply, problem with the main control board connections.
• Solutions:
  • Check the power cord connection at both the wall outlet and the terminal block on the back of the dryer. Ensure it is securely and correctly wired. If you are unsure, consult an electrician.
  • Check the voltage at the terminal block on the dryer using a multimeter (L1 and L2 should be around 240 Vac, L1 and NEUTRAL/L2 and NEUTRAL should be around 120 Vac).
  • Check the connectors at the Main PBA (main control board) to ensure the wire harness is securely connected.

AC / DF: Communication error between main board and control panel

These codes indicate a failure in communication between different electronic components in the dryer.

• Meaning: The main control board is not communicating correctly with the control panel where you select cycles and options.
• Possible Causes: Damaged wiring harness between the boards, loose connections, a faulty main control board, or a faulty control panel (sub-PCB).
• Solutions:
  • Visually inspect the wiring harness connecting the main control board and the control panel for any signs of damage.
  • Ensure the connector (often labeled CNC804) is properly seated on the main PCB.
  • Ensure the connector (often labeled J3) is properly seated on the sub-PCB (control panel board).
  • For advanced users: Measure the DC voltage going from the main PCB to the sub-PCB (expected 5 VDC to 12 VDC). If voltage is missing, test again with the connector removed. If still missing, the main PCB may be faulty.

AC4: Communication error between main board and the WiFi module

• Meaning: There is a problem with the communication between the main control board and the dryer’s Wi-Fi module.
• Possible Causes: Faulty signals, incorrect or loose connector connections, and faulty soldering on the WIFI module.
• Solutions:
  • Carefully check the connector connections between the Wi-Fi module and the main board for any looseness or incorrect placement.
  • If comfortable, remove the Wi-Fi module and inspect the soldering for any visible issues.
  • Note: This error may only appear in a specific diagnostic mode (Line Test Mode) and might not indicate a functional problem during normal operation.

AC6: Communication error between main board and inverter board

• Meaning: The main control board is not communicating correctly with the inverter board that controls the drum motor.
• Possible Causes: Faulty signals, issues with wire connections or terminal contacts, a faulty main board communication circuit, or a faulty inverter board communication circuit.
• Solutions:
  • Check the wire connections and terminal contacts between the main and inverter PBAs for any disconnected or loose wires.

Final Tip

Keeping your dryer vent clean is the most effective way to prevent many Samsung dryer error codes. Good airflow = better performance and fewer breakdowns.