What Is Daikin Error Code U4? How To Fix Daikin Error Code U4?

What is Daikin error code U4?

The U4 error code on a Daikin air conditioner is a fault indication that there is a malfunction in the compressor. The error code usually appears on the air conditioner’s display panel, alerting the user that there is a problem that needs to be fixed. If you see this error code, it is important to take immediate action to diagnose and repair the problem, as the malfunction can affect the performance and efficiency of the air conditioner. A professional HVAC technician should be consulted to diagnose and repair the problem.

Causes of Daikin U4 error code

The U4 error code on a Daikin air conditioner is usually caused by one of the following problems:

  • Power supply problem: If the power supply to the air conditioner is interrupted or there is a problem with the power cord, this may cause error code U4 to be displayed.

  • Compressor Wiring Problem – If the compressor wiring is loose or damaged, this may cause the U4 error code to be displayed.

  • Outdoor unit fan motor malfunction: If the outdoor unit fan motor is not working properly or if there are obstructions blocking the airflow, this may cause error code U4 to be displayed.

  • Other malfunctions: There could be other malfunctions in the air conditioner that could cause the U4 error code to display, such as problems with the compressor or control board.

It is important to note that these are just some of the possible causes of the U4 error code and that a professional HVAC technician should be consulted to diagnose and repair the problem.

How to fix Daikin error code U4?

Step 1. Check the power supply:

  • Make sure the power cord is connected correctly.
  • Verify that there is no interruption in the electrical supply.

Step 2. Check compressor wiring:

  • Make sure the wiring is connected correctly.
  • Make sure there are no loose connections.

Step 3. Check the outdoor unit fan motor:

  • Check that the fan is working properly.
  • Make sure there are no obstructions blocking airflow.

Step 4. If the above steps do not solve the problem:

  • Contact a professional HVAC technician.
  • The technician will diagnose and repair the problem.
  • They will perform a thorough inspection of the air conditioner to determine the cause of the U4 error code.
  • The problem may be a simple solution or a more complex repair.
  • It is always best to have a professional handle the repair to ensure proper function and safety.

Disclaimer: The above information is for general informational purposes only. All information on the Site is provided in good faith; However, we make no representations or warranties of any kind, express or implied, regarding the accuracy, adequacy, validity, reliability, availability or completeness of any information on the Site.

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