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
- Turn off the unit and disconnect power for 5–10 minutes to reset control circuits
- Check that outdoor unit is free of obstructions and clean (clear debris around coils/fans)
- Ensure the unit learned correct settings and remote control is not showing alternative errors
Technician Only Diagnose/repair compressor temperature sensor circuit
- Use service diagnostic tools (e.g., Fujitsu Mobile Technician app or equivalent) to read real‑time sensor values and compare against expected range
- Inspect wiring harness and connectors between compressor and control PCB for corrosion, looseness, or damage
- Test or replace the compressor temperature sensor if out of specification
- 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)
- 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
Next step
Choose the next step for 71
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
Temperature Sensor
Monitors the internal temperature to ensure correct operation and prevent overheating.
- Typical part-only price
- $15 - $35
- DIY difficulty
- Easy
- Estimated time
- 15-30 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.
Wiring Harness
Connects controls, sensors, motors, and other electrical components inside the appliance.
HVAC Control Board
Controls fan, compressor, sensor, and communication functions in the HVAC unit.
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
| note | The previous model-independent part specification was removed. Verify the full model number and diagnosis in the manufacturer's official parts catalog before ordering. |
|---|---|
| part_number | None |
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
- Fujitsu Error Codes List (Orion Air Sales) (community)
Data last verified: 2026-07-31
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