Mitsubishi Electric Mini Split Error Code EE: How to Fix It
Medium 45-90 minutes High Severity
Verified June 2026
- Error Code
- EE
- Brand
- Mitsubishi Electric
- Product Type
- mini_split
- Severity
- High
- DIY Difficulty
- Medium
- Estimated Fix Time
- 45-90 minutes
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Tools You'll Need
- Screwdriver set
- Multimeter
- Wire strippers
- Electrical contact cleaner
- Wire brush
How to Fix Error Code EE
-
Turn off power and check electrical connections
Always turn off power at the circuit breaker before inspecting electrical connections to prevent shock or electrocution. -
Inspect communication wire integrity
Handle wires carefully and avoid pulling or stretching damaged cables. -
Check outdoor unit connections
Ensure power is off and use insulated tools when working near electrical components. -
Test with multimeter
Only perform electrical testing if you're comfortable using a multimeter safely. -
Reset the system
-
Check for interference sources
Parts You May Need
Communication wire cable
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Wire nuts and electrical connectors
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Control board
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Communication wire cable
Check Price on Amazon
Wire nuts and electrical connectors
Check Price on Amazon
Control board
Check Price on Amazon
Communication wire cable
Check Price on Amazon
Wire nuts and electrical connectors
Check Price on Amazon
Control board
Check Price on Amazon
Communication wire cable
Check Price on Amazon
Wire nuts and electrical connectors
Check Price on Amazon
Control board
Check Price on Amazon
Communication wire cable
Check Price on Amazon
Wire nuts and electrical connectors
Check Price on Amazon
Control board
Check Price on Amazon
Communication wire cable
Check Price on Amazon
Wire nuts and electrical connectors
Check Price on Amazon
Control board
Check Price on Amazon
Communication wire cable
Check Price on Amazon
Wire nuts and electrical connectors
Check Price on Amazon
Control board
Check Price on Amazon
Communication wire cable
Check Price on Amazon
Wire nuts and electrical connectors
Check Price on Amazon
Control board
Check Price on Amazon
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When to Call a Professional
Call a certified HVAC technician if you find damaged communication wiring that needs replacement, if the control boards appear faulty, if you're uncomfortable working with electrical components, or if the error persists after checking all connections. Professional diagnosis may be needed to determine if control board replacement is required.Frequently Asked Questions
What causes Mitsubishi mini split error code EE?
Error code EE is caused by communication failure between the indoor and outdoor units, typically due to loose wiring connections, damaged communication cables, electrical interference, or faulty control boards.
Can I fix Mitsubishi error code EE myself?
Basic troubleshooting like checking connections and resetting the system can be done by homeowners with basic electrical knowledge. However, if wiring needs replacement or control boards are faulty, professional service is recommended.
How much does it cost to fix error code EE?
Costs vary from $150-300 for simple wiring repairs to $400-800 if control boards need replacement. The exact cost depends on whether it's a wiring issue or component failure.
Will my mini split work with error code EE showing?
No, your mini split will not operate properly with error code EE displayed. The system requires communication between indoor and outdoor units to function, so this error must be resolved first.
How do I prevent error code EE from happening again?
Prevent EE errors by protecting wiring from damage, ensuring proper installation with adequate wire separation from power cables, and scheduling regular maintenance to check electrical connections.