Mitsubishi Heat Pump Error Code EE: How to Fix It

Q: What causes Mitsubishi heat pump error code EE?

Error code EE is caused by communication problems between the indoor and outdoor units, typically due to loose, damaged, or corroded S1, S2, or S3 control wiring connections, or physical damage to the communication cable.

Q: Can I still use my Mitsubishi heat pump with error code EE?

No, error code EE prevents the system from operating properly. The indoor and outdoor units cannot communicate, so heating and cooling functions will not work until the communication error is resolved.

Q: How much does it cost to fix Mitsubishi error code EE?

If it's just loose connections, the fix costs nothing but your time. Professional service calls typically range from $150-300 for diagnosis and connection repairs. If communication cable replacement is needed, costs can range from $300-800 depending on cable length and installation complexity.

Q: How do I prevent Mitsubishi heat pump communication errors?

Prevent communication errors by scheduling annual professional maintenance, protecting outdoor wiring from rodents with conduit, ensuring proper drainage around units to prevent moisture damage, and promptly addressing any signs of loose connections or unusual system behavior.

Q: Why does my Mitsubishi heat pump show EE after a power outage?

Power surges during outages can sometimes loosen electrical connections or damage sensitive communication circuits. After power is restored, loose connections may not make proper contact, triggering the EE communication error.

Abstract

Mitsubishi heat pump error code EE indicates a communication breakdown between your indoor and outdoor units, typically caused by damaged or loose S1, S2, or S3 control wiring. This error prevents your system from operating properly and requires immediate attention to restore heating and cooling functions.