Samsung Air Conditioner Error E122

⚡ Quick Answer: The Samsung Air Conditioner error E122 indicates a communication failure between the indoor and outdoor units, primarily due to a defective heat excha... ✅ DIY Fixable

What Does Error E122 Mean?

The Samsung Air Conditioner error E122 indicates a communication failure between the indoor and outdoor units, primarily due to a defective heat exchanger or evaporator temperature sensor. This error often causes the display to flash, and the unit may stop operation or fail to regulate temperature effectively. Inspecting the sensor and its connections is essential for resolution.

Common Symptoms:

  • Error code E122 appears on indoor unit display after powering on
  • Unit may stop operation or enter error state
  • Sensor-related errors often stop normal temperature regulation

Possible Causes

  • Heat exchanger (evaporator) temperature sensor failure (high)
  • Open or shorted sensor wiring/connection (medium)

How to Fix Error E122

DIY Fix Check basic setup and restart

  1. Turn off the air conditioner and disconnect power for 5–10 minutes to reset the unit.
  2. Ensure that the air filters and unit intake are clean and unobstructed.
  3. Power the unit back on and check if the error returns.

Technician Only Inspect and replace temperature sensor / wiring

  1. Open the indoor unit to access the heat exchanger temperature sensor.
  2. Check wiring harness and connections between the sensor and control board for opens/shorts.
  3. Measure sensor resistance with a multimeter to confirm proper values per manufacturer spec.
  4. Replace defective sensor and repair any damaged wiring.

Parts needed: Heat exchanger / evaporator temperature sensor, Wiring harness or connector (if damaged)

🛑 When to Call a Pro:
  • If error persists after basic power reset and cleaning attempts
  • If sensor wiring appears damaged or inaccessible
  • If the unit does not function normally after attempted troubleshooting

Technical Specifications

wattage N/A
component Control Board
resistance N/A
part_number DA92-00110A
voltage_rating 220V AC

Common Questions

What does E122 error mean on Samsung Air Conditioner?

E122 indicates a communication failure due to a faulty heat exchanger temperature sensor, leading to operational issues.

Can I fix Samsung Air Conditioner E122 error myself?

Yes, you can try resetting the unit and cleaning air filters. If the error persists, further inspection is needed.

How much does it cost to fix E122 error?

Repair costs range from $20 to $100 for parts like the temperature sensor, excluding labor.

When should I call a technician for E122?

Call a technician if the error persists after a power reset, the wiring is damaged, or the unit isn't functioning normally.

Sources & References

Data last verified: 2026-07-01

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