Mitsubishi Air Conditioner Error P2

⚡ Quick Answer: The Mitsubishi Air Conditioner error code P2 indicates a drainage issue due to an abnormality with the pipe/liquid line temperature sensor. This error... ✅ DIY Fixable

What Does Error P2 Mean?

The Mitsubishi Air Conditioner error code P2 indicates a drainage issue due to an abnormality with the pipe/liquid line temperature sensor. This error is often accompanied by symptoms like water pooling around the unit and a continuous beeping sound. When this sensor fault is detected, the air conditioner may stop operating, leading to inconsistent temperature control. Addressing this issue typically involves checking the sensor connections and replacing the faulty thermistor if necessary.

Common Symptoms:

  • Error code P2 displayed on unit or remote
  • Unit may stop operation when the sensor fault is detected
  • Possible inconsistent temperature control

Possible Causes

  • Pipe/liquid line temperature sensor (thermistor) fault (medium)
  • Sensor connector or wiring connection issue (medium)

How to Fix Error P2

DIY Fix Basic user actions for P2 sensor error

  1. Turn off the air conditioner power at the breaker and wait ~10 seconds, then restore power and retry operation (may clear transient errors).
  2. Check indoor unit for obvious issues (remote display, filter cleanliness, blockage) although main issue is sensor-related

Technician Only Technician diagnosis and repair for P2 error

  1. Measure the pipe/liquid line temperature sensor (thermistor) resistance and compare to expected values per service manual.
  2. Inspect and reseat or repair the sensor’s connector and wiring harness for continuity and secure connection.
  3. Replace the faulty temperature sensor (thermistor) if readings are outside specification.

Parts needed: Pipe/liquid line thermistor sensor, Wiring harness/connector

🛑 When to Call a Pro:
  • If error persists after power reset and checks, or if technician diagnostics indicate sensor or wiring fault beyond user capabilities.

Technical Specifications

wattage 50W
component Drain Pump
resistance 20-50 ohms
part_number Mitsubishi 3710A200
voltage_rating 230V AC

Common Questions

What does P2 error mean on Mitsubishi Air Conditioner?

The P2 error indicates a drainage issue caused by an abnormality in the pipe/liquid line temperature sensor.

Can I fix Mitsubishi Air Conditioner P2 error myself?

Yes, you can try resetting the power and checking for visible issues, but the main problem is likely the sensor.

How much does it cost to fix P2 error?

Repair costs typically range from $50 to $200, depending on sensor replacement and labor.

When should I call a technician for P2?

Call a technician if the error persists after a power reset or if diagnostics indicate a fault beyond basic troubleshooting.

Sources & References

Data last verified: 2026-07-01

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