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Causes & Recommended Solutions

The H9 error code indicates a malfunction of the outdoor air thermistor. This thermistor measures the temperature of the outside air, and when it fails, it can disrupt the system’s operation.

Common Causes of the H9 Error Code

Faulty Outdoor Air Thermistor

Wiring Issues

Sensor Malfunction

Recommended Solutions

Inspect the Outdoor Thermistor for Issues

Ensure Proper Wiring Connections

Test the Sensor for Proper Functioning

Need Expert Help?

Call Skycon Air Conditioning!

If the H9 error persists, contact Skycon Air Conditioning for diagnosis and replacement of the outdoor air thermistor.
1300 264 424
1300 264 424