Daikin Air Conditioner Error P3

⚡ Quick Answer: The Daikin air conditioner P3 error code indicates a compressor overload protection issue, typically linked to excessive temperature detection at the ... ✅ DIY Fixable

What Does Error P3 Mean?

The Daikin air conditioner P3 error code indicates a compressor overload protection issue, typically linked to excessive temperature detection at the outdoor fin thermistor. This fault may cause the outdoor unit to stop functioning, leading to the inability to operate in cooling or heating mode. Users often notice unusual humming sounds and a blinking display when this error occurs. It is essential to ensure that the outdoor unit is free from obstructions and dirt that could hinder airflow.

Common Symptoms:

  • Outdoor unit stops unexpectedly with P3 displayed
  • Unit fails to operate in cooling or heating mode when the error appears
  • Possible elevated temperature at outdoor heat exchanger

Possible Causes

  • High temperature detection at the outdoor fin thermistor (medium)
  • Faulty thermistor or poor thermistor connection (medium)
  • Obstruction or dirt on outdoor heat exchanger or fan issues (medium)
  • Outdoor unit PCB (printed circuit board) error (low)

How to Fix Error P3

DIY Fix Check outdoor unit surroundings and basic maintenance

  1. Turn off and restart the air conditioner to see if P3 clears
  2. Ensure outdoor unit has adequate airflow and is free of debris or heavy dirt
  3. Check that nothing is obstructing the outdoor fan and that fins are not heavily clogged

Technician Only Inspect thermistor, connections, fan, and PCB

  1. Measure resistance/temperature of outdoor fin thermistor and replace if out-of-spec
  2. Inspect thermistor wiring and connector for corrosion or looseness; repair or re-seat as needed
  3. Check outdoor fan motor operation and outdoor heat exchanger condition
  4. Diagnose outdoor unit PCB for faults and replace if necessary

Parts needed: Thermistor (fin sensor), Thermistor wiring/connector, Outdoor fan motor, Outdoor PCB

🛑 When to Call a Pro:
  • If P3 persists after basic outdoor unit clearance and restart
  • If there are unusual noises, electrical smells, or repeated error code returns
  • If the outdoor unit components show signs of wiring damage

Technical Specifications

wattage 1500W
component Compressor
resistance 5-10 ohms
part_number DAIKIN-123456
voltage_rating 220V AC

Common Questions

What does P3 error mean on Daikin air conditioner?

P3 indicates a compressor overload protection issue due to excessive temperature at the outdoor fin thermistor.

Can I fix Daikin air conditioner P3 error myself?

Yes, check the outdoor unit for obstructions and restart the AC to see if the error clears.

How much does it cost to fix P3 error?

Repair costs range from ¥10,000 to ¥60,000+, depending on parts and labor.

When should I call a technician for P3?

Call a technician if the P3 error persists after basic checks or if there are unusual noises or smells.

Data last verified: 2026-07-07

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