Mitsubishi Error Code E6: Indoor/Outdoor Communication Error
Warning: Your Mitsubishi HVAC system has encountered an indoor/outdoor communication error. It's safe to operate, but a professional repair is needed.
How to Fix Mitsubishi Code E6
- Check for any visible damage to the communication wire
- Ensure the outdoor unit's fan is running
- Contact a professional HVAC technician for repair
How to Reset Mitsubishi Code E6
- Turn off the unit using the remote control or wall controller.
- Turn off the circuit breaker for the outdoor and indoor units. Wait 60 seconds.
- Restore power at the breaker.
- Turn the unit on with the remote control. If the error returns, the fault needs professional diagnosis.
What does E6 mean?
The E6 error on your Mitsubishi HVAC system indicates a communication issue between the indoor and outdoor units. This could be due to a faulty communication wire, a problem with the control board, or an issue with the outdoor unit's fan. The system will continue to operate, but some features may be limited.
Affected Models
Replacement Parts
| Part | OEM Number | Est. Cost |
|---|---|---|
| Communication Wire | — | — |
| Outdoor Unit Control Board | 53005-3000 | — |
Related Codes on Same Models
| Code | Description | Severity |
|---|---|---|
| 1 | Indoor/Outdoor Mismatch | Warning |
| 2 | Power Supply Phase Error | Warning |
| 3 | Communication Error | Warning |
| 4 | Inverter Error | Warning |
| 5 | Outdoor Thermistor Open/Short | Warning |
| 6 | Indoor Freeze/Overheat | Warning |
| 7 | Outdoor Freeze/Overheat | Warning |
| E9 | Indoor/Outdoor Communication Fault | Warning |
| P1 | Intake Sensor Error | Warning |
| P2 | Indoor Pipe Thermistor Error | Warning |