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lg | air-conditioner Error Codes: Troubleshooting, Fixes & Prevention Tips explained below.

What Does CH65 Mean?❓

CH65 means that the air conditioner cannot accurately read the temperature of the heat sink due to a faulty thermistor (temperature sensor). This prevents proper regulation of inverter performance and could lead to overheating if not addressed.

air-conditioner - Causes of CH65 Error

  • Faulty heat sink thermistor sensor
  • Loose or disconnected sensor wires
  • Corroded or damaged sensor terminals
  • Malfunctioning main control or inverter board
  • Overheating due to dust buildup on the heat sink

air-conditioner - How to Fix CH65 Error❓

  • Turn Off the System

    1. Shut off power to the AC from the breaker.
    2. Wait a few minutes before accessing components.

  • Inspect the Heat Sink Thermistor

    1. Open the outdoor unit and locate the heat sink.
    2. Check the sensor attached to it for visible damage or corrosion.

  • Reconnect or Replace Sensor

    1. Tighten any loose wires or connectors.
    2. If the sensor shows incorrect resistance, replace it.

  • Clean the Heat Sink

    1. Use compressed air or a soft brush to remove dust buildup.
    2. Ensure the heat sink has proper ventilation.

  • Consult a Technician

    1. If issue persists, the inverter or main PCB may need professional diagnosis.

air-conditioner - Helpful Tips

  • Do not operate the unit when this error appears to avoid damage.
  • Keep outdoor units clean and dust-free.
  • Schedule preventive maintenance twice a year.
  • Ensure proper airflow and no obstruction near the unit.
  • Use surge protectors to avoid PCB-related failures.

Frequently Asked Questions❓

Question: Is CH65 a serious error?
Answer: Yes. It affects the system’s cooling regulation and can damage components if ignored.
Question: Can I clean the sensor myself?
Answer: You can clean around it, but replacement or rewiring should be done by a technician.
Question: Will resetting the AC fix CH65?
Answer: Sometimes. But if the sensor is faulty, it needs replacement.

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