Fujitsu Mini-Split Error Code 36: How to Fix It

Medium 30-60 minutes Medium Severity Verified June 2026
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Error Code
36
Brand
Fujitsu
Product Type
mini_split
Severity
Medium
DIY Difficulty
Medium
Estimated Fix Time
30-60 minutes
Error code 36 on your Fujitsu mini-split indicates a fault with the outdoor unit's discharge pipe thermistor. This sensor monitors the temperature of the refrigerant line leaving the compressor. When it fails or reports incorrect readings, the system shuts down to prevent damage. This guide will help you diagnose and fix the issue.
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Tools You'll Need

How to Fix Error Code 36

  1. Safety First: Power Down

    High voltage present inside the outdoor unit. Always disconnect power before opening the panel.

  2. Access the Discharge Pipe Thermistor

  3. Visually Inspect the Thermistor

  4. Test the Thermistor with a Multimeter

    Be careful not to short the wires during testing.

  5. Check Wiring and Connections

  6. Replace the Faulty Thermistor

    Use the exact replacement part specified for your model.

  7. Test the System

    If error returns, power down immediately and call a technician.

Parts You May Need

Discharge pipe thermistor
Check Price on Amazon
Discharge pipe thermistor
Check Price on Amazon
Discharge pipe thermistor
Check Price on Amazon
Discharge pipe thermistor
Check Price on Amazon
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When to Call a Professional

If you are not comfortable working with high-voltage electrical components, or if replacing the thermistor does not clear the error code, call a licensed HVAC technician. A faulty control board or compressor issue requires professional diagnosis.

Frequently Asked Questions

Can I run my Fujitsu mini-split with error code 36?
No, running the system with this error could cause compressor damage. Turn off the system and address the fault.
Is error code 36 a common Fujitsu mini-split issue?
Yes, thermistor failures are relatively common, especially in systems exposed to harsh outdoor conditions.
Where can I buy a replacement discharge pipe thermistor?
You can purchase a thermistor from an HVAC parts supplier or online retailer. Ensure it matches your model number.
Do I need to evacuate refrigerant to replace the thermistor?
No, the thermistor is attached externally to the pipe, so no refrigerant handling is required.
How much does a professional repair cost?
Professional repair typically ranges from $200 to $500, including parts and labor.

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