LG Air Conditioner Sub PCB - 6871A00088A

Enhance the electronic coordination and operational reliability of your cooling system with the LG 6871A00088A Air Conditioner Sub PCB. This secondary circuit board functions as a specialized extension of the main controller, typically dedicated to managing specific sub-systems such as sensor arrays, plasma air purification features, or communication between the indoor and outdoor units. If your air conditioner is displaying obscure error codes, failing to respond to specific mode changes, or experiencing intermittent communication faults, this genuine sub PCB is often the key to restoring full system harmony.

Developed with high-grade micro-components and a protective conformal coating, the 6871A00088A is built to survive the thermal stress and humidity fluctuations found within the unit's electrical housing. Its precision-engineered pathways ensure that data signals are processed with zero latency, maintaining the high efficiency and rapid response time of your LG appliance.

1. Safety First: Completely power down the air conditioner and disconnect it from the power source (unplug or switch off the dedicated circuit breaker).
2. Access the Control Box: Open the indoor unit's front panel and remove the metal or plastic cover of the electrical control assembly.
3. Identify the Sub PCB: Locate the 6871A00088A board, which is usually mounted near or directly connected to the larger main PCB via a ribbon cable or wiring harness.
4. Document Connections: Before removal, take a clear photo of all wire colors and connector positions to ensure an accurate reinstallation.
5. Swap the Board: Carefully disconnect all wiring harnesses. Remove the mounting screws or unclip the faulty board from its plastic standoffs and install the new 6871A00088A PCB.
6. Secure and Test: Reconnect all wiring firmly until you hear/feel a click. Reassemble the control box cover and front panel before restoring power to verify that all system functions have returned to normal.

1. AC Auxiliary Control Board (Sub PCB) – Part Number: 6871A00088A
2. Restores Advanced Functions: Manages specialized communication and sensor tasks for total system control.
3. Stable Signal Processing: High-quality semiconductors ensure accurate and reliable data transmission.
4. Moisture & Heat Resistant: Built with a protective layer to prevent corrosion in high-humidity environments.
5. Direct OEM Replacement: Features factory-spec mounting points and connectors for a seamless repair.
6. OEM-Quality Part: Engineered by LG to meet the exact electrical and performance standards of your specific model.