Daikin Mini Split Error Code LA: How to Fix It

Q: How do I clear the Daikin LA error code after repair?

After repairing or replacing the inverter board and verifying proper operation, the error code should clear automatically once the system runs without faults. Some Daikin models require you to cycle the power (turn off the breaker for 30 seconds and turn it back on). If the code persists, there is still a fault.

Q: Can I replace just the power transistor instead of the whole board?

Yes, if you have experience with soldering and can find the exact replacement transistor module, you can replace only that component. However, if the board has other damage or you're unsure, replacing the entire inverter board is more reliable.

Q: What causes a power transistor fault in a Daikin mini split?

Common causes include: voltage surges, overheating due to poor ventilation, moisture intrusion, age-related component failure, or a failing compressor that draws excessive current.

Q: Is it safe to run the AC with error code LA?

No. Running the unit with a power transistor fault can damage the compressor or other critical components and may pose a fire risk. Turn off the system and address the error immediately.

Q: How much does professional repair for Daikin error LA cost?

Typical costs range from $200 to $600, including a service call fee and the cost of the inverter board (which can be $150–$400). Labor varies by region.

Abstract

Error code LA on your Daikin mini split means the air conditioner has detected a fault with the power transistor in the outdoor unit's inverter board. This component is critical for converting AC power to DC and controlling compressor speed. You'll need to inspect and possibly replace the inverter board or power transistor module.