Daikin Mini Split Error Code JC: How to Fix It
Medium 30-60 minutes Medium Severity
Verified June 2026
- Error Code
- JC
- 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
- Screwdriver
- Multimeter
- Wrench set
- Refrigerant oil (if replacing sensor)
- Service manual (for resistance values)
How to Fix Error Code JC
-
Turn Off Power
Always disconnect power before servicing. -
Check Sensor Wiring
Be careful of sharp edges and refrigerant lines. -
Check Sensor Resistance
-
Check Power Supply to Sensor
High voltage present. Only perform if you are qualified or call a professional. -
Replace Suction Pressure Sensor
Refrigerant handling requires EPA certification. Do not attempt unless certified. -
Test System
Parts You May Need
Suction pressure sensor
Check Price on Amazon
Suction pressure sensor
Check Price on Amazon
Suction pressure sensor
Check Price on Amazon
Suction pressure sensor
Check Price on Amazon
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When to Call a Professional
If you are not comfortable working with high voltage or refrigerant lines, or if the error persists after sensor replacement, call a licensed HVAC technician. This error can also indicate a control board issue that requires professional repair.Frequently Asked Questions
What does error code JC mean on a Daikin mini split?
Error code JC indicates a suction pressure sensor fault. The sensor monitors low-pressure refrigerant and may have failed, or there is a wiring issue.
Can I still use my Daikin AC with error JC?
It is not recommended. The system may shut down or run inefficiently, which can cause further damage. Fix the error before using.
How much does it cost to replace a suction pressure sensor?
The sensor part costs around $50 to $150. If you hire a technician, labor adds $100 to $200.