Mitsubishi Error Code P2: Indoor Pipe Thermistor Error
Warning: Your Mitsubishi HVAC system has detected an issue with the indoor pipe thermistor. It's safe to keep running, but you should schedule a professional repair soon.
How to Fix Mitsubishi Code P2
- Check if the indoor unit is receiving power
- Inspect the wiring harness for any visible damage
- If you're comfortable, clean the thermistor gently with a soft brush
How to Reset Mitsubishi Code P2
- 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 P2 mean?
The P2 error code on your Mitsubishi HVAC system indicates a problem with the indoor pipe thermistor. This component measures the temperature of the refrigerant as it enters the indoor unit. If it's not working properly, your system might not cool or heat correctly. The most common causes are a faulty thermistor or a problem with the wiring.
Affected Models
Replacement Parts
| Part | OEM Number | Est. Cost |
|---|---|---|
| Indoor Pipe Thermistor | 520030-0000 | — |
| Wiring Harness | 520031-0000 | — |
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 |