The LG Air Conditioner Main PCB (Control Board) - 6871A20500B is the correct replacement for the following model numbers.
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Product Information
Restore the intelligent heart of your cooling system with the LG Air Conditioner Main PCB Control Board (6871A20500B). As the primary command center of the unit, this printed circuit board (PCB) manages every critical function, from processing remote control signals and monitoring temperature sensors to cycling the compressor and fan motors. If your air conditioner is completely unresponsive, failing to start the cooling cycle, displaying intermittent error codes, or suffering from erratic fan speeds, a faulty or shorted main control board is likely the cause.
Manufactured with high-grade electronic components and logic controllers, the 6871A20500B is engineered to provide stable power distribution and precise operational logic. Replacing a damaged board ensures your unit regains its factory-standard efficiency, safety features, and programmed cooling modes.
Installation / Replacement Instructions:
Safety First: Completely power off the air conditioner and unplug it from the wall, or shut off the dedicated circuit breaker. Warning: Wait at least 5 minutes for internal capacitors to discharge before touching the board.
Access the Control Box: Remove the front grille and unscrew the metal or plastic protective cover of the internal electrical control box.
Document the Wiring: Before disconnecting anything, take multiple clear, detailed photographs of all wire harnesses, spade connectors, and ribbon cables attached to the old board.
Remove the Faulty PCB: Carefully unplug all connectors. Do not pull on the wires themselves; grasp the plastic plug heads. Remove the mounting screws or release the plastic stand-off clips holding the board to the chassis.
Install the New Board: Secure the new 6871A20500B board in the same orientation. Reattach all wiring harnesses exactly as they appeared in your reference photos, ensuring every connection is seated firmly and clicked into place.
Reassemble and Test: Replace the control box cover and the unit's outer panels. Restore power and use the remote to verify that all modes, fan speeds, and temperature settings are functioning correctly.
Compatible with select LG air conditioner models, this OEM-quality main control board provides the exact electrical specifications and programming required for a total system restoration.
Key Features:
AC Main PCB / Control Board – Part number 6871A20500B
Central Command System – Manages compressor timing, fan speeds, and sensor data
Resolves Critical Failures – Fixes non-starting units, dead displays, and erratic behavior
Precision Logic Control – Ensures accurate temperature regulation and energy efficiency
Integrated Safety Protocols – Monitors for system faults to prevent mechanical damage
Genuine OEM Part – Pre-programmed and ready for immediate installation in compatible LG units
The LG Air Conditioner Main PCB (Control Board) - 6871A20500B is the correct replacement for the following model numbers.
Restore the intelligent heart of your cooling system with the LG Air Conditioner Main PCB Control Board (6871A20500B). As the primary command center of the unit, this printed circuit board (PCB) manages every critical function, from processing remote control signals and monitoring temperature sensors to cycling the compressor and fan motors. If your air conditioner is completely unresponsive, failing to start the cooling cycle, displaying intermittent error codes, or suffering from erratic fan speeds, a faulty or shorted main control board is likely the cause.
Manufactured with high-grade electronic components and logic controllers, the 6871A20500B is engineered to provide stable power distribution and precise operational logic. Replacing a damaged board ensures your unit regains its factory-standard efficiency, safety features, and programmed cooling modes.
Installation / Replacement Instructions:
Safety First: Completely power off the air conditioner and unplug it from the wall, or shut off the dedicated circuit breaker. Warning: Wait at least 5 minutes for internal capacitors to discharge before touching the board.
Access the Control Box: Remove the front grille and unscrew the metal or plastic protective cover of the internal electrical control box.
Document the Wiring: Before disconnecting anything, take multiple clear, detailed photographs of all wire harnesses, spade connectors, and ribbon cables attached to the old board.
Remove the Faulty PCB: Carefully unplug all connectors. Do not pull on the wires themselves; grasp the plastic plug heads. Remove the mounting screws or release the plastic stand-off clips holding the board to the chassis.
Install the New Board: Secure the new 6871A20500B board in the same orientation. Reattach all wiring harnesses exactly as they appeared in your reference photos, ensuring every connection is seated firmly and clicked into place.
Reassemble and Test: Replace the control box cover and the unit's outer panels. Restore power and use the remote to verify that all modes, fan speeds, and temperature settings are functioning correctly.
Compatible with select LG air conditioner models, this OEM-quality main control board provides the exact electrical specifications and programming required for a total system restoration.
Key Features:
AC Main PCB / Control Board – Part number 6871A20500B
Central Command System – Manages compressor timing, fan speeds, and sensor data
Resolves Critical Failures – Fixes non-starting units, dead displays, and erratic behavior
Precision Logic Control – Ensures accurate temperature regulation and energy efficiency
Integrated Safety Protocols – Monitors for system faults to prevent mechanical damage
Genuine OEM Part – Pre-programmed and ready for immediate installation in compatible LG units
The LG Air Conditioner Main PCB (Control Board) - 6871A20500B is the correct replacement for the following model numbers.
Restore the intelligent heart of your cooling system with the LG Air Conditioner Main PCB Control Board (6871A20500B). As the primary command center of the unit, this printed circuit board (PCB) manages every critical function, from processing remote control signals and monitoring temperature sensors to cycling the compressor and fan motors. If your air conditioner is completely unresponsive, failing to start the cooling cycle, displaying intermittent error codes, or suffering from erratic fan speeds, a faulty or shorted main control board is likely the cause.
Manufactured with high-grade electronic components and logic controllers, the 6871A20500B is engineered to provide stable power distribution and precise operational logic. Replacing a damaged board ensures your unit regains its factory-standard efficiency, safety features, and programmed cooling modes.
Installation / Replacement Instructions:
Safety First: Completely power off the air conditioner and unplug it from the wall, or shut off the dedicated circuit breaker. Warning: Wait at least 5 minutes for internal capacitors to discharge before touching the board.
Access the Control Box: Remove the front grille and unscrew the metal or plastic protective cover of the internal electrical control box.
Document the Wiring: Before disconnecting anything, take multiple clear, detailed photographs of all wire harnesses, spade connectors, and ribbon cables attached to the old board.
Remove the Faulty PCB: Carefully unplug all connectors. Do not pull on the wires themselves; grasp the plastic plug heads. Remove the mounting screws or release the plastic stand-off clips holding the board to the chassis.
Install the New Board: Secure the new 6871A20500B board in the same orientation. Reattach all wiring harnesses exactly as they appeared in your reference photos, ensuring every connection is seated firmly and clicked into place.
Reassemble and Test: Replace the control box cover and the unit's outer panels. Restore power and use the remote to verify that all modes, fan speeds, and temperature settings are functioning correctly.
Compatible with select LG air conditioner models, this OEM-quality main control board provides the exact electrical specifications and programming required for a total system restoration.
Key Features:
AC Main PCB / Control Board – Part number 6871A20500B
Central Command System – Manages compressor timing, fan speeds, and sensor data
Resolves Critical Failures – Fixes non-starting units, dead displays, and erratic behavior
Precision Logic Control – Ensures accurate temperature regulation and energy efficiency
Integrated Safety Protocols – Monitors for system faults to prevent mechanical damage
Genuine OEM Part – Pre-programmed and ready for immediate installation in compatible LG units
