Daewoo Air Conditioner Error 3

⚡ Quick Answer: The Daewoo air conditioner error code 3 signifies a failure in the indoor temperature sensor, which can lead to erratic temperature readings and incon... ✅ DIY Fixable

What Does Error 3 Mean?

The Daewoo air conditioner error code 3 signifies a failure in the indoor temperature sensor, which can lead to erratic temperature readings and inconsistent cooling. This issue often stems from communication or connection problems between the indoor and outdoor units. It's essential to check the wiring and sensor connections to resolve this fault and restore optimal performance.

Common Symptoms:

  • Error code 3 displayed on indoor unit display
  • Possible failure to run or abnormal operation

Possible Causes

  • Communication/connection or sensor fixation issue between indoor and outdoor units (medium)
  • Potential gas leakage indicated in some community documentation (low)

How to Fix Error 3

DIY Fix Basic Inspection & Reset

  1. Turn off the air conditioner and disconnect power at the breaker.
  2. Wait a few minutes, then restore power and restart the unit to see if the error clears.
  3. Ensure remote control settings and indoor temperature settings are correct.

Technician Only Technician Diagnostic and Repair

  1. Check the voltage between N and Y on the terminal block and verify correct wiring connections between indoor and outdoor units.
  2. Inspect the relay KI on the power PCB and verify the indoor coil thermistor fixation and connections.
  3. Check for signs of refrigerant gas leakage and inspect sensors and communication wiring for faults.

Parts needed: Terminal block wiring harness, Relay KI on power PCB, Indoor coil thermistor, Refrigerant lines (for leakage inspection)

🛑 When to Call a Pro:
  • If basic reset and simple checks do not clear the error
  • If wiring or components inside units need inspection beyond user capability
  • When refrigerant system issues or gas leaks are suspected

Technical Specifications

wattage N/A
component Indoor Temperature Sensor
resistance 10k ohms at 25°C
part_number DAC-TS-001
voltage_rating 5V DC

Common Questions

What does 3 error mean on daewoo air conditioner?

Error 3 indicates a failure in the indoor temperature sensor, causing erratic readings and inconsistent cooling.

Can I fix daewoo air conditioner 3 error myself?

Yes, you can try resetting the unit and checking temperature settings as a first step.

How much does it cost to fix 3 error?

$100–$400 depending on parts and labor in your region.

When should I call a technician for 3?

Call a technician if the error persists after a reset or if wiring inspection is needed.

Data last verified: 2026-04-23

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