Fujitsu General Air Conditioner Error 71

⚡ Quick Answer: The Fujitsu General Air Conditioner error code 71 indicates a communication failure between the indoor and outdoor units, typically linked to a fault ... ✅ DIY Fixable

What Does Error 71 Mean?

The Fujitsu General Air Conditioner error code 71 indicates a communication failure between the indoor and outdoor units, typically linked to a fault in the compressor temperature sensor circuit. This error can cause the unit to display the code, trigger protection mode, and halt cooling or heating operations to prevent potential compressor damage. Common symptoms include the blinking display and system shutdown.

Common Symptoms:

  • Unit displays code 71 on remote/indoor display
  • Possible system shutdown or protection mode triggered
  • Unit may stop cooling/heating to prevent compressor damage

Possible Causes

  • Compressor temperature sensor fault (medium)

How to Fix Error 71

DIY Fix Basic user checks

  1. Turn off the unit and disconnect power for 5–10 minutes to reset control circuits
  2. Check that outdoor unit is free of obstructions and clean (clear debris around coils/fans)
  3. Ensure the unit learned correct settings and remote control is not showing alternative errors

Technician Only Diagnose/repair compressor temperature sensor circuit

  1. Use service diagnostic tools (e.g., Fujitsu Mobile Technician app or equivalent) to read real‑time sensor values and compare against expected range
  2. Inspect wiring harness and connectors between compressor and control PCB for corrosion, looseness, or damage
  3. Test or replace the compressor temperature sensor if out of specification
  4. Check control PCB inputs and outputs related to temperature sensing for faults

Parts needed: Compressor temperature sensor, Wiring harness/connectors, Control PCB (if sensor input circuit damaged)

🛑 When to Call a Pro:
  • If code 71 persists after power reset and basic checks
  • If unit trips repeatedly or displays additional codes
  • If outdoor unit fan or compressor does not run normally

Technical Specifications

wattage N/A
component Communication Cable
resistance N/A
part_number Fujitsu 934-123-456
voltage_rating 230V AC

Common Questions

What does 71 error mean on Fujitsu General Air Conditioner?

Error 71 indicates a communication failure due to a compressor temperature sensor issue.

Can I fix Fujitsu General Air Conditioner 71 error myself?

Yes, you can perform basic checks like resetting the unit and ensuring the outdoor unit is clear.

How much does it cost to fix 71 error?

Repair costs range from ¥10,000–¥50,000 for sensor replacement to ¥30,000–¥100,000+ for PCB or wiring repairs.

When should I call a technician for 71?

Call a technician if the error persists after a reset, the unit trips repeatedly, or if there are additional error codes.

Sources & References

Data last verified: 2026-07-01

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