Daewoo Air Conditioner Error E1

⚡ Quick Answer: The Daewoo air conditioner E1 error indicates a communication failure between the indoor and outdoor units, which can disrupt normal cooling operation... ✅ DIY Fixable

What Does Error E1 Mean?

The Daewoo air conditioner E1 error indicates a communication failure between the indoor and outdoor units, which can disrupt normal cooling operations. This issue may stem from faulty wiring, a defective temperature sensor, or loose connections. When the E1 code appears, the unit may stop responding, and the display will flash.

Common Symptoms:

  • Unit displays E1 on indoor unit display
  • Air conditioner stops normal cooling operation when error appears
  • Potential loss of communication between indoor and outdoor unit

Possible Causes

  • Communication error between indoor and outdoor units (medium)
  • Faulty temperature sensor or connector (medium)

How to Fix Error E1

DIY Fix Basic checks and resets

  1. Turn off the air conditioner and disconnect power.
  2. Wait a few minutes and power the unit back on to attempt a reset.
  3. Visually inspect accessible wiring for obvious damage or loose connectors.

Technician Only Diagnostic inspection and repair

  1. Use HVAC diagnostic tools to verify communication signals between indoor and outdoor units.
  2. Check resistance and continuity of indoor/outdoor temperature sensor and connectors.
  3. Repair or replace faulty wiring harness, sensor modules, or PCB communication interface as needed.

Parts needed: Communication wiring harness, Temperature sensor/thermistor units, Control board (if confirmed faulty by technician diagnostics)

🛑 When to Call a Pro:
  • If the E1 code persists after basic resets and visual checks
  • If there is any smoke, burning smell, or signs of electrical damage

Technical Specifications

wattage 2000W
component Control Board
resistance 5-15 ohms
part_number DAEWOO PCB123456
voltage_rating 220V AC

Common Questions

What does E1 error mean on Daewoo air conditioner?

E1 error indicates a communication failure between indoor and outdoor units, stopping normal cooling.

Can I fix Daewoo air conditioner E1 error myself?

Yes, you can try basic checks like resetting the unit and inspecting wiring for damage.

How much does it cost to fix E1 error?

Repair costs typically range from $100 to $400, depending on the fault and region.

When should I call a technician for E1?

Call a technician if the E1 code persists after resets or if there are signs of electrical damage.

Sources & References

Data last verified: 2026-04-23

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