Daikin Mini Split Error Code LC: How to Fix It
Medium 30-60 minutes Medium Severity
Verified June 2026
- Error Code
- LC
- Brand
- Daikin
- Product Type
- mini_split
- Severity
- Medium
- DIY Difficulty
- Medium
- Estimated Fix Time
- 30-60 minutes
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Tools You'll Need
- Multimeter
- Screwdrivers (Phillips and flathead)
- Wire strippers
- Electrical tape
How to Fix Error Code LC
-
Turn Off Power
High voltage can cause serious injury or death. Ensure power is off before proceeding. -
Check Wiring Connections
-
Inspect for Damage
-
Measure Continuity
Ensure power is off. Do not test with power on. -
Restore Power and Test
Parts You May Need
Communication cable (2- or 4-conductor, shielded)
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Terminal block connector
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Indoor or outdoor control board PCB
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Communication cable (2- or 4-conductor, shielded)
Check Price on Amazon
Terminal block connector
Check Price on Amazon
Indoor or outdoor control board PCB
Check Price on Amazon
Communication cable (2- or 4-conductor, shielded)
Check Price on Amazon
Terminal block connector
Check Price on Amazon
Indoor or outdoor control board PCB
Check Price on Amazon
Communication cable (2- or 4-conductor, shielded)
Check Price on Amazon
Terminal block connector
Check Price on Amazon
Indoor or outdoor control board PCB
Check Price on Amazon
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When to Call a Professional
If you have checked all wiring and the error persists, the indoor or outdoor PCB may be faulty. Replacement requires advanced electronics knowledge and proper refrigerant handling if line connections are disturbed. Contact a certified HVAC technician.Frequently Asked Questions
What does error code LC mean on a Daikin mini split?
LC indicates a transmission or communication error between the indoor and outdoor units, often due to wiring issues or a faulty control board.
Can I fix Daikin error code LC myself?
Yes, if it's a simple wiring issue like loose connections or a damaged wire. If the control board is faulty, professional help is recommended.
How do I reset a Daikin mini split after error LC?
Turn off the breaker for 10 minutes, then turn it back on. If the error code reappears, there is still an underlying issue.
What wires carry the transmission signal on Daikin mini splits?
Typically the P1 and P2 terminals on the outdoor unit terminal block connect to the indoor unit. Also check the D1 and D2 terminals on some models.
How much does it cost to fix Daikin error LC?
DIY fix is cost of parts (wiring, connectors). Professional repair can range from $150–$500 depending on whether a control board needs replacement.