If you have cleaned the filters, checked for obstructions, and reset the unit, but the 9C code persists, it is time to call a certified HVAC technician.
Did this guide help you fix your AC? Let us know in the comments below! o general ac error code 9c
: For wireless models, replace the batteries and ensure no physical obstacles are blocking the signal to the indoor unit sensor. If you have cleaned the filters, checked for
Look for burnt marks or loose connections on the outdoor unit's power terminal PCB Compatibility: : For wireless models, replace the batteries and
Switch off the main power supply (MCB/Switch) and unplug the unit if possible Wait for 5–10 minutes to allow the capacitors on the PCB to discharge completely
If the voltage is significantly lower than 200V, the AC will continue to show the 9C error for safety
between components, most commonly involving the wired remote controller and the indoor unit. Understanding the 9c Error