Mitsubishi Air Conditioner Error UF

⚡ Quick Answer: The Mitsubishi Air Conditioner UF error code indicates a malfunction in the indoor unit fan, typically caused by compressor overcurrent due to a locke... ✅ DIY Fixable

What Does Error UF Mean?

The Mitsubishi Air Conditioner UF error code indicates a malfunction in the indoor unit fan, typically caused by compressor overcurrent due to a locked rotor or mechanical binding. This issue may lead to the unit stopping operation, lack of cooling or heating output, and the compressor either failing to start or running briefly before stopping. Addressing this malfunction promptly is essential to restore your air conditioner's functionality.

Common Symptoms:

  • Unit suddenly stops operation when UF is displayed
  • No cooling/heating output
  • Compressor does not start or runs briefly then stops

Possible Causes

  • Compressor overcurrent due to locked rotor or mechanical binding (high)
  • Outdoor unit power/PCB electrical circuit fault affecting compressor current control (medium)

How to Fix Error UF

DIY Fix Preliminary Checks Before Resetting

  1. Turn off the air conditioner and disconnect from power for at least 5 minutes to clear electronic protections
  2. Check external conditions: ensure power supply to unit is stable and correct voltage
  3. Inspect outdoor unit area for obvious obstructions or debris around compressor fan and unit

Technician Only Diagnose and Repair Compressor and Control Circuit

  1. Measure compressor current draw and compare with manufacturer specifications
  2. Check compressor for mechanical lock or bearing failure
  3. Inspect outdoor power PCB and inverter circuitry for damage or failed components
  4. Verify wiring integrity between indoor and outdoor units

Parts needed: Compressor, Outdoor Power PCB/Inverter, Current sensors, Wiring harness

🛑 When to Call a Pro:
  • If UF persists after simple power disconnect reset
  • If compressor does not spin freely when tested by technician
  • If electrical diagnostics show abnormal current draw or PCB errors

Technical Specifications

wattage 50W
component Indoor fan motor
resistance 10-20 ohms
part_number Mitsubishi 220V Fan Motor - Model: 123456
voltage_rating 220V AC

Common Questions

What does UF error mean on Mitsubishi Air Conditioner?

UF error indicates a malfunction in the indoor unit fan due to compressor overcurrent, leading to the unit stopping and lack of cooling.

Can I fix Mitsubishi Air Conditioner UF error myself?

Yes, you can perform preliminary checks like disconnecting power and inspecting for obstructions before resetting the unit.

How much does it cost to fix UF error?

The estimated repair cost for the UF error ranges from ¥30,000 to ¥120,000, depending on parts and service.

When should I call a technician for UF?

Call a technician if the UF error persists after a reset, if the compressor does not spin freely, or if there are abnormal current readings.

Sources & References

Data last verified: 2026-07-07

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