Daikin Mini Split Error Code E3: How to Fix It
Medium 30 minutes to 1 hour (excluding refrigerant repair) High Severity
Verified June 2026
- Error Code
- E3
- Brand
- Daikin
- Product Type
- mini_split
- Severity
- High
- DIY Difficulty
- Medium
- Estimated Fix Time
- 30 minutes to 1 hour (excluding refrigerant repair)
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Tools You'll Need
- Multimeter
- Screwdriver set
- Manifold gauge set (for refrigerant check)
- Coil cleaner or garden hose
- Soft brush or cloth
How to Fix Error Code E3
-
Turn Off Power and Wait
Always disconnect power before working on the unit to avoid electric shock. -
Check and Clean the Air Filter
-
Inspect and Clean the Condenser Coil
Do not use high-pressure water; it may bend fins or damage electrical components. -
Check for Refrigerant Leaks
Refrigerant handling requires certification. Stop if you are not qualified. -
Inspect the High Pressure Switch and Wiring
Ensure power is off before testing continuity.
Parts You May Need
High pressure switch
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Air filter
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High pressure switch
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Air filter
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High pressure switch
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Air filter
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High pressure switch
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Air filter
Check Price on Amazon
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When to Call a Professional
If cleaning the coils and filters doesn't clear the error, or if you suspect a refrigerant leak or faulty compressor, call an HVAC professional. Refrigerant work requires certification and special tools.Frequently Asked Questions
Can I reset Daikin error code E3 myself?
Yes, you can reset by turning off the system at the breaker for 10 minutes, then turning it back on. However, if the underlying issue isn't fixed, the error will return.
How much does it cost to fix error code E3?
If DIY, costs are minimal (cleaning supplies). Hiring a pro for refrigerant repair or compressor issues can range from $200 to $800 depending on the problem.
Is error code E3 serious for a Daikin mini split?
Yes, it indicates a high pressure condition that can damage the compressor if ignored. It should be addressed promptly.
What causes Daikin error code E3?
Common causes include dirty condenser coils, clogged air filters, refrigerant overcharge or leak, faulty high pressure switch, or a malfunctioning condenser fan motor.
Can I run my Daikin AC with error code E3?
No. Operating the unit with error E3 can cause further damage. Turn off the system and troubleshoot the issue before restarting.