Daikin Mini Split Error Code AA: How to Fix It
Easy 15-30 minutes Medium Severity
Verified June 2026
- Error Code
- AA
- Brand
- Daikin
- Product Type
- mini_split
- Severity
- Medium
- DIY Difficulty
- Easy
- Estimated Fix Time
- 15-30 minutes
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Tools You'll Need
- Vacuum cleaner
- Multimeter
- Screwdriver
How to Fix Error Code AA
-
Turn Off Power
Always disconnect power before performing any maintenance to avoid electric shock. -
Check and Clean Air Filter
-
Inspect for Airflow Obstructions
-
Reset the System
-
Test the Heater Components
Only perform this step if you are comfortable working with live circuits. Otherwise, call a professional.
Parts You May Need
Electric heater element
Check Price on Amazon
Thermal fuse
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Electric heater element
Check Price on Amazon
Thermal fuse
Check Price on Amazon
Electric heater element
Check Price on Amazon
Thermal fuse
Check Price on Amazon
Electric heater element
Check Price on Amazon
Thermal fuse
Check Price on Amazon
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When to Call a Professional
If the error persists after cleaning and resetting, or if you are not comfortable testing electrical components, contact a licensed HVAC technician. Repeated overheating can damage the unit or pose a fire hazard.Frequently Asked Questions
What does error code AA mean on a Daikin mini split?
It means the electric heater has overheated due to restricted airflow, dirty filter, or faulty heater element.
Can I fix Daikin error code AA myself?
Yes, often by cleaning the air filter and ensuring good airflow. If the problem persists, professional service may be needed.
How do I reset Daikin error code AA?
Turn off the unit and unplug it for 10 minutes, then restart. This may clear the error if the overheating was temporary.