Samsung Air Conditioner Error E221

⚡ Quick Answer: The Samsung Air Conditioner E221 error code signifies a communication failure between the indoor and outdoor units, often linked to a temperature sens... ✅ DIY Fixable

What Does Error E221 Mean?

The Samsung Air Conditioner E221 error code signifies a communication failure between the indoor and outdoor units, often linked to a temperature sensor fault. This can cause abnormal temperature readings and prevent normal operation of the unit. Users may notice inconsistent temperature readouts, with the AC ceasing to function properly when the error is displayed.

Common Symptoms:

  • AC stops operation and displays E221
  • Temperature readouts abnormal or inconsistent
  • Unit fails to run normally when error present

Possible Causes

  • Temperature sensor fault (external/pipe sensor) (medium)
  • Indoor fan motor or motor feedback issue (low)

How to Fix Error E221

DIY Fix Basic checks and reset

  1. Turn off power to the air conditioner at the breaker or main switch.
  2. Wait a few minutes and restore power to attempt clearing temporary glitches.
  3. Check that no obstructions are blocking outdoor unit airflow or sensors.

Technician Only Sensor and wiring inspection/replacement

  1. Inspect temperature sensor wiring on outdoor/pipe sensors for open, short, or loose connections.
  2. Use a multimeter to verify sensor resistance values are within specification for the specific model.
  3. Replace faulty temperature sensor(s) if readings are outside expected range.

Parts needed: Temperature sensor(s), Wiring harness/connectors

🛑 When to Call a Pro:
  • If basic reset and visual inspections do not clear the error
  • If sensor wiring checks require disassembly beyond user competency

Technical Specifications

wattage 2000W
component Control Board
resistance 5-15 ohms
part_number DA92-00400A
voltage_rating 220V AC

Common Questions

What does E221 error mean on Samsung Air Conditioner?

E221 indicates a communication failure, often due to a temperature sensor fault.

Can I fix Samsung Air Conditioner E221 error myself?

Yes, try resetting the unit and checking for airflow obstructions.

How much does it cost to fix E221 error?

Repair costs range from $50 to $200 for parts, depending on the sensor type.

When should I call a technician for E221?

Call a technician if the error persists after basic checks or requires disassembly.

Sources & References

Data last verified: 2026-07-01

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