Mitsubishi Air Conditioner Error PA
⚡ Quick Answer: The Mitsubishi Air Conditioner error code PA indicates a compressor overload protection issue, often related to a drain system malfunction leading to ... ✅ DIY Fixable
What Does Error PA Mean?
The Mitsubishi Air Conditioner error code PA indicates a compressor overload protection issue, often related to a drain system malfunction leading to water accumulation or leakage. Symptoms include the PA code displayed, potential system shutdown, and unusual humming sounds. Addressing this issue promptly can prevent further damage and restore normal operation.
Common Symptoms:
- Error code PA displayed on unit or remote controller
- Possible system shutdown or interruption of normal operation
- Indication of water accumulation, drain pan issues or leakage
Possible Causes
- Drain system issue leading to water accumulation or leak detection (medium)
How to Fix Error PA
DIY Fix Check drain and leakage paths
- Turn off the air conditioner and disconnect power before inspecting.
- Check the drain pipe and pan for blockages, incorrect slope, or visible water accumulation.
- Inspect the drain sensor and clean any debris that may interfere with sensing.
- Clear any obstructions and ensure proper drainage.
Technician Only Service drain sensors and related components
- Confirm PA error with diagnostic tools and system logs.
- Inspect drain pan float switches and wiring for proper operation.
- Test and replace faulty drain sensors or float switches as needed.
- Inspect and if necessary replace drain pumps or piping that are malfunctioning.
Parts needed: drain sensor / float switch, drain pump (if present), drain piping
- If water leakage is observed or water damage risk is present
- If the PA error persists after basic drain and sensor cleaning
- If the unit fails to restart normally after corrective attempts
Next step
Choose the next step for PA
Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.
Most relevant component to inspect
Compressor
Compresses refrigerant within the sealed cooling system and requires specialized service equipment.
- Typical part-only price
- $180 - $600
- DIY difficulty
- Hard
- Estimated time
- 120-240 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.
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.
Capacitor
Stores electrical energy to assist in starting or running the motor efficiently.
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.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. We may earn a commission from other qualifying purchases or service requests made through links on this page, at no additional cost to you. Recommendations are based on repair relevance, not commission rate.
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.
Air Conditioner Fin Cleaner
For routine cleaning of accessible coil fins when permitted by the manufacturer. Disconnect power and follow product and appliance instructions.
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.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. Recommendations are based on routine-care relevance, not commission rate.
Technical Specifications
| wattage | 2000W |
|---|---|
| component | Compressor |
| resistance | 5-10 ohms |
| part_number | Mitsubishi 5R00A |
| voltage_rating | 230V AC |
Common Questions
What does PA error mean on Mitsubishi Air Conditioner?
The PA error indicates a compressor overload protection issue, often due to water accumulation or drain system failure.
Can I fix Mitsubishi Air Conditioner PA error myself?
Yes, you can check for blockages in the drain and clean the drain sensor as a DIY action.
How much does it cost to fix PA error?
Repair costs can range from ¥5,000 to ¥30,000+, depending on parts and labor required.
When should I call a technician for PA?
Call a technician if leakage is observed, the PA error persists after cleaning, or if the unit fails to restart normally.
Data last verified: 2026-07-22
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