LG Mini Split Error Code CH23: How to Fix It

Q: What causes LG mini split error code CH23?

Error code CH23 is caused by low DC link voltage, typically due to a failing inverter PCB, faulty DC link capacitor, or damaged power supply components in the outdoor unit. Electrical surges and component aging are common causes.

Q: Can I fix CH23 error myself?

While you can perform basic diagnostics like checking connections and testing the capacitor, CH23 repairs usually require replacing the inverter board or capacitors, which should be done by a certified technician due to high voltage dangers and warranty considerations.

Q: How much does it cost to fix CH23 error?

Repair costs typically range from $300-800 depending on whether you need a new capacitor ($50-150) or inverter board ($200-500), plus labor costs. Always get quotes from certified LG service technicians.

Q: Will my mini split work with CH23 error?

No, the CH23 error prevents the compressor from operating properly. The system will shut down to protect itself from damage. Continuing to run the unit with this error can cause more expensive damage to the compressor.

Q: How do I prevent CH23 error from happening again?

Install a surge protector for your mini split system, ensure proper electrical supply voltage, and schedule annual maintenance to check electrical connections and component condition. Keep the outdoor unit clean and free from debris.

Abstract

LG mini split error code CH23 indicates a DC link voltage low fault, typically caused by a failing inverter PCB (printed circuit board) or faulty capacitor in the outdoor unit. This is a critical electrical issue that affects the compressor's ability to operate properly and requires immediate attention to prevent further damage.