Mitsubishi Mini Split Error Code PA: How to Fix It

Q: Can I reset error code PA without calling a technician?

Yes, try power cycling the system by turning off the breaker for 5 minutes. If the error is due to a temporary glitch, it will clear. However, if it returns, further troubleshooting is needed.

Q: What does 'forced compressor stop' mean?

It means the system's protection logic automatically stopped the compressor to prevent damage from abnormal conditions like high pressure, low pressure, or sensor failure.

Q: How do I clean the outdoor unit coils?

Turn off power, then spray the coils with a hose from the inside out to remove dirt and debris. Avoid bending the fins. Use a soft brush if needed.

Q: Is PA error serious?

It can be if left unresolved. It protects the compressor from damage. Common causes are dirty coils or faulty sensors, which are easy fixes, but ignoring it may lead to compressor failure.

Q: How much does it cost to fix error PA?

DIY fixes cost nothing (cleaning, resetting). Hiring a technician for diagnosis and repair typically ranges from $150-$400, depending on the issue (sensor replacement, refrigerant recharge).

Abstract

Error code PA on your Mitsubishi mini split indicates the outdoor unit has forced a compressor stop due to a protection activation. This often happens when the system detects abnormal conditions like high pressure, low pressure, or sensor faults. Follow these steps to troubleshoot and resolve the issue.