Mitsubishi Mini Split Error Code UE: How to Fix It

Q: What does error code UE mean on a Mitsubishi mini split?

Error code UE indicates the low pressure switch has tripped, meaning the refrigerant pressure is too low. Common causes include a dirty filter, refrigerant leak, or faulty pressure switch.

Q: Can I fix a Mitsubishi UE error myself?

Yes, you can clean the air filter and check for obvious issues. However, if the problem persists or involves refrigerant, you need a professional.

Q: How do I reset a Mitsubishi mini split after UE error?

Turn off the unit via remote and disconnect power at the breaker for 5 minutes, then restore power. If the error returns, further diagnosis is needed.

Q: How much does it cost to fix a UE error?

Costs vary: cleaning filters is free; pressure switch replacement may cost $150-$300; refrigerant leak repair can range from $200 to $1,500 depending on severity.

Q: How to prevent UE error on Mitsubishi mini split?

Regularly clean or replace air filters every 1-2 months, schedule annual professional maintenance, and keep outdoor unit clear of debris.

Abstract

Error code UE on a Mitsubishi mini split indicates a low pressure switch activation, meaning the refrigerant pressure in your system has dropped too low. This can be caused by a refrigerant leak, a dirty air filter, or a faulty pressure switch. Follow these steps to diagnose and resolve the issue.