Mitsubishi Air Conditioner Error P6

⚡ Quick Answer: The Mitsubishi Air Conditioner P6 error signifies a compressor overload protection issue, triggered by freezing or overheating safeguards. This result... ✅ DIY Fixable

What Does Error P6 Mean?

The Mitsubishi Air Conditioner P6 error signifies a compressor overload protection issue, triggered by freezing or overheating safeguards. This results in the system stopping unexpectedly, leading to a significant loss in cooling or heating performance, often accompanied by unusual humming sounds. It is essential to address this issue promptly to prevent potential damage to the unit.

Common Symptoms:

  • System stops during operation when P6 is displayed
  • Sudden loss of cooling or heating performance
  • Possible fluctuations in temperature output

Possible Causes

  • Freezing/overheating protection triggered due to abnormal operating conditions (high)

How to Fix Error P6

DIY Fix Basic Inspection and Reset

  1. Turn off and unplug the air conditioner.
  2. Clean or replace the air filters.
  3. Ensure nothing is blocking airflow around indoor and outdoor units.
  4. Wait a few minutes then restart the system.

Technician Only In-depth System Diagnostics & Service

  1. Measure refrigerant pressures and inspect for leaks.
  2. Check indoor and outdoor fan operation and airflow.
  3. Evaluate thermistors and temperature sensors for correct operation.
  4. Inspect wiring and connections for faults or corrosion.
  5. Verify compressor and associated protection circuits are functioning correctly.

Parts needed: Refrigerant lines and valves, Temperature sensor/thermistors, Fan motors and filters

🛑 When to Call a Pro:
  • If the error persists after filter cleaning and basic reset
  • If there are signs of refrigerant leak (hissing sound or oil residue)
  • If indoor/outdoor fans are not operating normally

Next step

Choose the next step for P6

Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.

Based on diagnostic data

Most relevant component to inspect

Temperature Sensor

Monitors the internal temperature to ensure correct operation and prevent overheating.

Typical part-only price
$15 - $35
DIY difficulty
Easy
Estimated time
15-30 mins
Where can I find the model number?

Check the rating label around the door, lid, frame, rear panel, or inside the appliance cabinet. Use the complete model number, including suffixes.

Find a part that fits my model

Verify the complete model and part number on the retailer's compatibility page before ordering.

Other parts options

Check related components first; use model search as a fallback.

Possible related component

Thermistor

Measures precise temperature changes and sends resistance feedback to the control board.

$15 - $35 · Easy · 15-30 mins

Check fit & price
Model number required

Model-compatible Air Conditioner parts

Enter the complete model number to browse compatible replacement parts. This is a model-based parts search, not a diagnosis that a specific component failed.

Find a part that fits my model

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Optional routine care

Maintenance supplies

These products support cleaning or routine upkeep. They are separate from the possible repair components above and are not claimed to fix this error code or symptom.

Maintenance supply

Air Conditioner Fin Cleaner

For routine cleaning of accessible coil fins when permitted by the manufacturer. Disconnect power and follow product and appliance instructions.

View maintenance supply
Maintenance supply

Model-Compatible Washable AC Filter

A reusable filter option only where the appliance supports one. Match the full model, dimensions, and filter specification.

Compatibility check required: use the complete appliance model and compare the existing filter, bag, or specification before ordering.

Find one that fits my model

Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. Recommendations are based on routine-care relevance, not commission rate.

Technical Specifications

wattage 1200W
component Compressor
resistance 5-10 ohms
part_number Mitsubishi 5P1000A
voltage_rating 230V AC

Common Questions

What does P6 error mean on Mitsubishi Air Conditioner?

The P6 error indicates a compressor overload protection issue, often causing the system to stop and leading to a loss of cooling or heating.

Can I fix Mitsubishi Air Conditioner P6 error myself?

Yes, you can perform basic inspections like cleaning or replacing air filters and ensuring airflow isn't blocked.

How much does it cost to fix P6 error?

Repair costs for the P6 error typically range from ¥10,000 to ¥50,000+, depending on the region, model, and specific faults.

When should I call a technician for P6?

Call a technician if the error persists after basic cleaning and reset, or if you notice signs of refrigerant leaks or abnormal fan operations.

Sources & References

Data last verified: 2026-07-22

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