Daikin aircon error code

Daikin AC is known for its cutting-edge technology, energy efficiency, and reliability. However, like all appliances, they may occasionally run into issues. One of the advantages of Daikin systems is their ability to display error codes that help identify and troubleshoot problems quickly.

In this comprehensive guide by COOLCARE AIRCON, we'll walk you through the most common Daikin aircon error codes, what they mean, and what steps you can take before calling a professional.

 Why Do Daikin Aircons Show Error Codes?

Daikin ACs are equipped with self-diagnostic technology. When the unit detects something unusual, it stops functioning and displays an alphanumeric error code (e.g., U4, L5, A1). These codes correspond to specific faults within the indoor or outdoor unit, communication system, or sensor components. Daikin aircon not cold 

Understanding these codes can help you:

  • Pinpoint the issue faster



  • Decide whether it's a minor fix or needs expert service



  • Prevent further damage by avoiding improper usage

How to Read a Daikin Error Code

Most Daikin models display error codes directly on the indoor unit screen, remote controller, or through LED blinking patterns. Here's a general method to read the error:

  1. Turn off the unit.



  2. Press and hold the “Cancel” button on the remote control for about 5–10 seconds.



  3. The display will show a 2-digit error code (e.g., U0, J6) followed by a long beep when the actual error is identified. Panasonic aircon Promotion



Pro Tip from COOLCARE AIRCON: Always take a photo of the error code before turning off your unit or resetting it. It helps our technicians provide faster support.

 Common Daikin Aircon Error Codes & Their Meaning

Here are some of the most frequently reported Daikin AC error codes:

Aircon General Service

Aircon Chemical wash

Aircon Chemical overhaul

Aircon repair

Aircon Steam cleaning

Aircon Gas topup

1. U0 – Low Refrigerant Level

Cause: This usually indicates a refrigerant shortage or leak.

Fix: Needs professional servicing to check for leaks and refill the refrigerant gas.

2. U4 – Communication Error

Cause: Indoor and outdoor units aren't communicating.

Fix: Check for loose wiring or power supply issues. May require technician inspection.

3. A1 – Indoor PCB Malfunction

Cause: Fault in the indoor unit's printed circuit board.

Fix: A technician may need to repair or replace the PCB.

4. C4 – Faulty Heat Exchanger Thermistor

Cause: The Sensor on the heat exchanger is malfunctioning.

Fix: Sensor replacement is usually needed.

5. L5 – Compressor Lock or Overcurrent

Cause: Issues with the compressor operation.

Fix: This is a critical error; turn off the unit and call a professional immediately.

6. J6 – Discharge Pipe Temperature Error

Cause: The Temperature around the compressor is too high. Daikin Aircon Light Blinking Fix: May require refrigerant balancing or sensor check.

When to Call COOLCARE AIRCON

While some minor issues like filter cleaning or remote control resets can be handled at home, most Daikin aircon error codes require professional attention to avoid worsening the problem.

You should contact COOLCARE AIRCON if:

  • The same error code keeps reappearing



  • Your AC stops working completely



  • There are unusual noises or smells



  • You suspect a refrigerant leak



 Preventing Aircon Errors: Maintenance Tips

Daikin aircon Servicing

Mitsubishi Aircon Servicing

Midea Aircon Servicing

Panasonic Aircon Service

To keep your Daikin unit running smoothly, follow these best practices:

  • Clean filters every 2–4 weeks



  • Schedule professional servicing at least once a year Mitsubishi aircon not cold



  • Check outdoor unit clearance and keep it free from dust and debris



  • Avoid overuse during peak heat – use timers and eco modes



  • Inspect for leaks or unusual noises regularly



Need maintenance? COOLCARE AIRCON offers reliable and affordable Daikin aircon servicing for homes and businesses across.

 Why Choose COOLCARE AIRCON for Daikin Repairs?

At COOLCARE AIRCON, we specialize in servicing Daikin AC of all types – split, cassette, multi-split, and VRV systems. Our certified technicians are trained to:

  • Accurately diagnose and resolve error codes



  • Use genuine Daikin parts and tools



  • Ensure long-term performance and efficiency



  • Offer fast response and transparent pricing



With years of experience in the AC industry, we've built a reputation for honesty, professionalism, and top-notch service.

 Need Help with a Daikin Error Code? Contact COOLCARE AIRCON Today!

Don't let an error code leave you hot and frustrated. At the first sign of trouble, reach out to COOLCARE AIRCON – your trusted Daikin service experts. Whether it's an urgent repair, regular servicing, or complete unit replacement, we've got you covered.

Final Thoughts

Understanding Daikin AC error codes can save you time, money, and stress. While some minor issues can be DIY-fixed, many require the skilled hands of professionals. That's where COOLCARE AIRCON comes in – ready to deliver expert service, accurate diagnosis, and total peace of mind.

Contact information:

Call: +65 90235452  (or) WhatsApp us: https://wa.me/6590235452

 Mandai Estate, 

Singapore -729908.

Mail ID: info@coolcare.com.sg

#airconservice #airconservicesigapore #airconservicing #airconservicingsingapore #bestairconservicing #bestairconservice #airconservicecompany #airconchemicalwash #bestairconservicingcompanyinSingapore #Daikinairconservicing #mideaairconservicing #panasonicairconservicing #Mitsubishiairconservicing #aircongeneralservice #aircongastopup #airconsteamcleaning #airconchemicalwash #airconchemicaloverhaul #airconrepair #airconrepairSingapore #airconrepairservice #bestairconsingapore #airconserviceprice #airconservicepricesingapore #bestaircongeneralservice #bestairconchemicalwash #bestairconchemicaloverhaul #Coolcareairconservice #commercialairconmaintenance #residentialairconmaintenance #commercialairconmaintenance #residentialairconmaintenance #residentailairconservice #commercialairconservice #residentialairconinstallation #commercailairconinstallation #airconservicingcompany #aircool #coolcareairconservice  #airconsteamcleaning #aircongastopup #airconleakingwater #airconwaterleakage #airconpromotion #airconpromotion2025 #airconpromotionsingapore2025 #daikinairconpromotion #mitsubishiairconpromotion #mideaairconpromotion #panasonicairconpromotion #airconspareparts #daikinairconinstallation #mitsubishiairconinstallation #mideaairconinstallation #panasonicairconinstallation #hitachiairconinstallation #greeairconinstallation #yorkairconinstallation #sharpairconinstallation #panasonicairconpromotion #Daikinaircon #Mitsubishiaircon #Mideaaircon #Panasonicaircon #airconinstallationpromotion #airconinstallationpromotion2025 #commercialairconmaintenance #residentialairconmaintenance #airconinstallationsingaporecondo #airconinstallationsingaporelanded #airconinstallationsingaporeHDB/BTO #commercialairconinstallationsingapore #airconsingapore #cheapestairconsingapore #bestairconsingapore #airconlightblinking