Daewoo Air Conditioner Error 1

⚡ Quick Answer: The Daewoo air conditioner error code E1 indicates a communication failure between the indoor and outdoor units. This prevents proper exchange of cont... ✅ DIY Fixable

What Does Error 1 Mean?

The Daewoo air conditioner error code E1 indicates a communication failure between the indoor and outdoor units. This prevents proper exchange of control and sensor information, resulting in the AC stopping cooling or heating. Users may notice the E1 code displayed, and the outdoor unit may fail to start, necessitating troubleshooting or professional assistance.

Common Symptoms:

  • AC stops cooling or heating and displays E1 on panel
  • Indoor and outdoor units fail to coordinate operation
  • Outdoor unit may not start with E1 displayed

Possible Causes

  • Communication failure between indoor and outdoor units (medium)
  • Control board communication circuit fault (low)

How to Fix Error 1

DIY Fix Basic user troubleshooting for E1

  1. Turn off the air conditioner and disconnect power for at least 5–10 minutes to reset system.
  2. Check that the outdoor unit and indoor unit display panels are free of obstruction and that the unit has power.
  3. Visually inspect the outdoor and indoor unit connecting cable (communication line) for visible damage or kinks.
  4. Ensure connectors are fully plugged in at both indoor and outdoor units if easily accessible without disassembly.

Technician Only Technician diagnosis and repair of E1 communication fault

  1. Use diagnostic tools to check continuity and signal on the communication cable between indoor and outdoor units.
  2. Inspect and replace damaged communication wiring or connectors as needed.
  3. Test indoor and outdoor control boards for proper communication signal handling.
  4. Confirm stable power supply voltage and check for interference or grounding issues that could affect communication.

Parts needed: communication cable, wire connectors, indoor/outdoor control boards

🛑 When to Call a Pro:
  • If communication wiring shows physical damage that cannot be safely accessed
  • If resetting and basic inspection do not clear the error and unit remains non‑functional
  • If there are signs of electrical damage (burn marks, melted connectors)

Technical Specifications

wattage 1500W
component Control Board
resistance 5-15 ohms
part_number DAEWOO-AC-CB-001
voltage_rating 220V AC

Common Questions

What does 1 error mean on daewoo air conditioner?

The E1 error indicates a communication failure between the indoor and outdoor units.

Can I fix daewoo air conditioner 1 error myself?

Yes, you can reset the system and check for visible cable damage as a first step.

How much does it cost to fix 1 error?

Repair costs can range from $50 to $300+, depending on parts and labor.

When should I call a technician for 1?

Call a technician if you find physical damage to wiring or if the error persists after basic troubleshooting.

Data last verified: 2026-04-23

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