Mitsubishi Electric Mini Split Error Code P2: How to Fix It

Q: What causes a P2 error code on Mitsubishi mini splits?

The P2 error is caused by a faulty liquid pipe thermistor sensor, which can fail due to age, moisture damage, loose connections, or physical damage to the sensor or its wiring.

Q: Can I run my Mitsubishi mini split with a P2 error?

No, the system will not operate properly with a P2 error. The thermistor is essential for temperature regulation, and the unit will shut down to prevent damage when this sensor fails.

Q: How much does it cost to fix a P2 error on a Mitsubishi mini split?

DIY repair typically costs $20-50 for a replacement thermistor. Professional repair usually ranges from $150-300 including parts and labor, depending on your location and the specific model.

Q: How long do mini split thermistors typically last?

Thermistors typically last 8-15 years, but can fail earlier due to moisture exposure, physical damage, or electrical issues. Regular maintenance can help extend their lifespan.

Q: Will a P2 error clear itself on a Mitsubishi mini split?

No, a P2 error will not clear on its own. The faulty thermistor must be repaired or replaced, and the system reset before normal operation can resume.

Abstract

The Mitsubishi Electric P2 error code indicates a failure in the indoor unit's liquid pipe thermistor, which is the temperature sensor that monitors refrigerant temperature. This sensor helps your mini split system regulate cooling and heating efficiently, and when it fails, the system cannot operate properly.