Mitsubishi Error Code P8: Pipe Temp Error
Warning: Your Mitsubishi HVAC system has detected an issue with the pipe temperature, which may cause system damage if not addressed.
How to Fix Mitsubishi Code P8
- Step 1: Turn off your HVAC system at the thermostat and the circuit breaker to prevent further system damage.
- Step 2: Check the air filter and replace it if it's dirty. A clogged filter can cause airflow issues and overheating.
- Step 3: Call a professional HVAC technician to diagnose and repair the issue. Do not attempt to open the unit or handle refrigerant lines yourself.
How to Reset Mitsubishi Code P8
- 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 P8 mean?
The P8 error on your Mitsubishi HVAC system indicates that the pipe temperature has exceeded the safe operating range. This could be due to a faulty temperature sensor or a problem with the system's refrigerant flow. If left unchecked, this issue can lead to system damage and reduced efficiency.
Affected Models
Replacement Parts
| Part | OEM Number | Est. Cost |
|---|---|---|
| Pipe Temperature Sensor | 55674-00000 | — |
| Expansion Valve | 55673-00000 | — |
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 |
| E6 | Indoor/Outdoor Communication Error | Warning |
| E9 | Indoor/Outdoor Communication Fault | Warning |
| P1 | Intake Sensor Error | Warning |