Fujitsu General Air Conditioner Error 25

⚡ Quick Answer: The Fujitsu General air conditioner error code 25 indicates a communication failure between the indoor and outdoor units, often due to an abnormality ... ⚠️ Difficulty Varies

What Does Error 25 Mean?

The Fujitsu General air conditioner error code 25 indicates a communication failure between the indoor and outdoor units, often due to an abnormality in the indoor unit's thermistor (temperature sensor). This error may cause the display to flash and result in the air conditioner failing to cool or regulate temperature effectively. Inconsistent temperature readings or an inability to reach the setpoint may also occur.

Common Symptoms:

  • Unit displays error code 25 on remote or diagnostic display
  • Air conditioner stops operation or fails to regulate temperature
  • Possible inconsistent temperature readings or failure to reach setpoint

Possible Causes

  • Indoor unit thermistor (temperature sensor) abnormality (medium)

How to Fix Error 25

DIY Fix Basic user checks for thermistor/temperature sensor error

  1. Turn off power to the unit and wait a few minutes, then power back on to see if the error clears.
  2. Ensure air filters are clean and airflow is unobstructed (poor airflow can sometimes affect temperature sensors).
  3. Inspect room for large drafts or obstructions that might cause inaccurate temperature readings.

Technician Only Technician diagnosis and repair for indoor thermistor error

  1. Measure resistance and response of the indoor unit temperature sensor (thermistor) to verify if within specification.
  2. Inspect sensor wiring harness and connectors for open circuits, shorts, or corrosion.
  3. Replace faulty thermistor or associated wiring as needed; verify operation post‑repair.

Parts needed: Indoor unit thermistor (temperature sensor), Wiring harness/connectors

🛑 When to Call a Pro:
  • If error reoccurs after basic power reset and airflow checks.
  • If thermistor wiring or sensor appears damaged or ambiguous during inspection.

Technical Specifications

wattage N/A
component Communication Cable
resistance N/A
part_number Fujitsu 9999-999-999
voltage_rating 220V AC

Common Questions

What does 25 error mean on fujitsu general air conditioner?

Error 25 means there's a communication failure due to a thermistor issue, causing the unit to stop cooling.

Can I fix fujitsu general air conditioner 25 error myself?

Yes, you can reset the power and check airflow or filters, but further issues may require professional help.

How much does it cost to fix 25 error?

Repair costs range from ¥5,000 to ¥20,000 for parts, with labor costs varying by region.

When should I call a technician for 25?

Call a technician if the error persists after a reset or if any wiring or sensor appears damaged.

Data last verified: 2026-07-01

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