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
- Turn off the air conditioner and disconnect power for 5–10 minutes to reset the unit.
- Ensure that the air filters and unit intake are clean and unobstructed.
- Power the unit back on and check if the error returns.
Technician Only Inspect and replace temperature sensor / wiring
- Open the indoor unit to access the heat exchanger temperature sensor.
- Check wiring harness and connections between the sensor and control board for opens/shorts.
- Measure sensor resistance with a multimeter to confirm proper values per manufacturer spec.
- Replace defective sensor and repair any damaged wiring.
Parts needed: Heat exchanger / evaporator temperature sensor, Wiring harness or connector (if damaged)
- 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
Next step
Choose the next step for E122
Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.
Most relevant component to inspect
Temperature Sensor
Monitors the internal temperature to ensure correct operation and prevent overheating.
- Typical part-only price
- $15 - $35
- DIY difficulty
- Easy
- Estimated time
- 15-30 mins
Where can I find the model number?
Check the rating label around the door, lid, frame, rear panel, or inside the appliance cabinet. Use the complete model number, including suffixes.
Verify the complete model and part number on the retailer's compatibility page before ordering.
Other parts options
Check related components first; use model search as a fallback.
Wiring Harness
Connects controls, sensors, motors, and other electrical components inside the appliance.
Model-compatible Air Conditioner parts
Enter the complete model number to browse compatible replacement parts. This is a model-based parts search, not a diagnosis that a specific component failed.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. We may earn a commission from other qualifying purchases or service requests made through links on this page, at no additional cost to you. Recommendations are based on repair relevance, not commission rate.
Optional routine care
Maintenance supplies
These products support cleaning or routine upkeep. They are separate from the possible repair components above and are not claimed to fix this error code or symptom.
Air Conditioner Fin Cleaner
For routine cleaning of accessible coil fins when permitted by the manufacturer. Disconnect power and follow product and appliance instructions.
Model-Compatible Washable AC Filter
A reusable filter option only where the appliance supports one. Match the full model, dimensions, and filter specification.
Compatibility check required: use the complete appliance model and compare the existing filter, bag, or specification before ordering.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. Recommendations are based on routine-care relevance, not commission rate.
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: 2026-07-22
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