Fujitsu General Air Conditioner Error 64

⚡ Quick Answer: Fujitsu General Air Conditioner error code 64 indicates a communication failure between the indoor and outdoor units. This may result in the display b... ✅ DIY Fixable

What Does Error 64 Mean?

Fujitsu General Air Conditioner error code 64 indicates a communication failure between the indoor and outdoor units. This may result in the display blinking or showing an error message, accompanied by a complete stop of airflow from the side fan and a failure to cool or heat effectively. The likely cause is a hardware fault related to the internal fan or air purification unit.

Common Symptoms:

  • Error code 64 displayed on remote or unit
  • Airflow from side fan stops
  • Unit stops cooling/heating

Possible Causes

  • Internal fan (side fan) or related air purification unit hardware fault (low)

How to Fix Error 64

DIY Fix Basic checks before professional service

  1. Turn off and unplug the unit for 5–10 minutes, then restart to see if error persists
  2. Check for any visible blockages at intake, filters, and side fan inlet
  3. Clean air filters and any accessible air purification unit components according to the manual

Technician Only Professional inspection and repair

  1. Inspect internal side fan motor and air purification unit for mechanical failure or blockage
  2. Check high-voltage supply lines and related control board connections
  3. Replace defective components such as side fan, air purification assembly, high-voltage supply, or control board as needed

Parts needed: Side fan motor, Air purification unit, High-voltage supply board, Main control board

🛑 When to Call a Pro:
  • If error 64 recurs after basic reset and cleaning
  • If unusual noises or lack of airflow persist

Next step

Choose the next step for 64

Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.

Check during diagnosis

Most relevant component to inspect

HVAC Control Board

Controls fan, compressor, sensor, and communication functions in the HVAC unit.

Typical part-only price
$90 - $320
DIY difficulty
Hard
Estimated time
45-120 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.

Find a part that fits my model

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.

Model number required

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.

Find a part that fits my model

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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.

Maintenance supply

Air Conditioner Fin Cleaner

For routine cleaning of accessible coil fins when permitted by the manufacturer. Disconnect power and follow product and appliance instructions.

View maintenance supply
Maintenance supply

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.

Find one that fits my model

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 64 error mean on Fujitsu General Air Conditioner?

Error 64 indicates a communication failure, stopping airflow and cooling/heating.

Can I fix Fujitsu General Air Conditioner 64 error myself?

Yes, try unplugging the unit, checking for blockages, and cleaning filters.

How much does it cost to fix 64 error?

Repair costs vary by model and region; consult a technician for specifics.

When should I call a technician for 64?

Call a technician if the error recurs after a reset or if airflow issues persist.

Data last verified: 2026-07-31

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