Fujitsu General Air Conditioner Error 29

⚡ Quick Answer: The Fujitsu General air conditioner error code 29 indicates a communication failure between the indoor and outdoor units, often due to an abnormal rea... ✅ DIY Fixable

What Does Error 29 Mean?

The Fujitsu General air conditioner error code 29 indicates a communication failure between the indoor and outdoor units, often due to an abnormal reading from the outdoor heat exchanger temperature sensor. This can lead to the unit stopping operation and displaying the error code. If the outdoor unit fails to run or shuts down shortly after starting, it's essential to address this issue promptly.

Common Symptoms:

  • Unit stops operation and displays code 29 on controller or indoor display
  • Outdoor unit may not run or may shut down shortly after startup

Possible Causes

  • Outdoor heat exchanger/middle temperature sensor abnormal reading (low)

How to Fix Error 29

DIY Fix Verify basic conditions and power cycle

  1. Turn off the unit and disconnect power (breaker or plug).
  2. Wait 5–10 minutes and restore power.
  3. See if the code clears and whether normal operation resumes.

Technician Only Inspect outdoor heat exchanger temperature sensor and wiring

  1. Access the outdoor unit and locate the heat exchanger temperature sensor (thermistor).
  2. Check wiring harness continuity and connector seating between outdoor sensor and control board.
  3. Test sensor resistance against expected values per service manual for the model.
  4. Replace the sensor/thermistor if it is out of specification or shows open/short circuit.

Parts needed: Outdoor heat exchanger temperature sensor (thermistor), Wiring harness if damaged

🛑 When to Call a Pro:
  • If the code persists after a power cycle
  • If sensor wiring appears damaged or if there is uncertainty about outdoor unit diagnostics

Technical Specifications

wattage N/A
component Control Board
resistance N/A
part_number Fujitsu 999-999-999
voltage_rating 230V AC

Common Questions

What does 29 error mean on fujitsu general air conditioner?

Error 29 means a communication failure between indoor and outdoor units, often due to a faulty outdoor heat exchanger sensor.

Can I fix fujitsu general air conditioner 29 error myself?

Yes, you can try power cycling the unit by turning it off and disconnecting power for 5-10 minutes.

How much does it cost to fix 29 error?

Repair costs for error 29 range from ¥5,000 to ¥20,000 for parts, plus labor depending on your region.

When should I call a technician for 29?

Call a technician if the code persists after a power cycle or if you notice damaged sensor wiring.

Data last verified: 2026-07-01

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