LG Control Boards

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Welcome to the South Mini Splits collection for LG Control Boards. We provide high-quality, authentic replacement components and sophisticated PCB assemblies to keep your LG HVAC systems running at peak performance. Our inventory includes specialized parts such as Inverter Power Modules, Outdoor Main PCBs, and Indoor Display Boards, ensuring compatibility across a wide range of LG Art Cool, Dual Inverter, and Multi F series platforms.

Whether you are performing a routine repair or a complex system overhaul, these precision-engineered, durable, and reliable boards are essential for maintaining the communication, efficiency, and advanced logic of your LG inverter-driven systems.

💡 Why Choose South Mini Splits for Your LG Control Boards?

✅ Wholesale Pricing: Competitive rates on critical LG electronic components and subassemblies.

✅ USA-Based Support: Expert technical assistance to help you identify the exact board or module for your specific LG model number.

✅ Free Shipping Over $300: Get your vital replacement parts delivered fast to minimize system downtime.

Understanding LG Control Boards & Modules

Control boards act as the "brain" of your HVAC system. In LG’s advanced inverter systems, this involves a complex ecosystem of boards working in tandem to regulate power and comfort:

  1. Outdoor Main PCBs: These boards manage the primary logic for the condenser, including safety protocols, fan speed regulation, and system-wide communication.
  2. Inverter Power Modules (IPM): Specialized boards that specifically manage the variable speed of the LG twin-rotary compressor to optimize energy use and maintain ultra-quiet operation.
  3. Indoor Unit PCBs: These facilitate high-speed communication between the indoor head and the outdoor unit, ensuring the system responds instantly to thermostat changes and sensor data.

Technical Facts & Performance Advantages

  • Dual Inverter Precision: LG boards are designed to support Dual Inverter technology, which allows for a wider rotational frequency to save more energy and cool rooms faster than traditional compressors.
  • Gold Fin™ Compatibility: Our boards are engineered to work alongside LG's specialized hardware, managing the defrost cycles and protection modes necessary for units operating in high-corrosion environments.
  • Diagnostic Ready: Modern LG-compatible boards feature onboard LED diagnostics or support for LG ThinQ and Smart Diagnosis, helping technicians quickly identify fault codes via smartphone, reducing labor hours during repairs.

Voltage Stability: Our inventory accounts for varied power requirements, offering boards tested for 208-230V and specialized subassemblies designed to handle the fluctuations of modern electrical grids.

Mini Split BTU Sizing & Application Guide

Use our quick reference chart to match your room size with the ideal system capacity.

Capacity Sq. Footage Application
6,000 BTU150–250Small bedrooms & offices
9,000 BTU250–450Standard bedrooms
12,000 BTU450–600Kitchens & studios
18,000 BTU600–1,000Living rooms & garages
24,000 BTU1,000–1,200Open floor plans
36,000 BTU1,500–1,700Commercial & fitness
48,000 BTU1,900–2,100Large warehouses
60,000 BTU2,400–2,800+Commercial estates

When to "Size Up"

High Ceilings (10ft+)

If your ceilings are 10 feet or higher, you are cooling a larger volume of air. We recommend increasing your BTU choice by 20%.

Poor Insulation

For older homes or buildings with single-pane windows, opt for the next size up to ensure the unit can maintain the set temperature.

Kitchen Environments

Appliances generate significant heat. If the unit is for a kitchen, add 4,000 BTUs to your square footage calculation.

Heavy Sun Exposure

Rooms with large south-facing windows or "sunrooms" act like greenhouses. Increase your BTU capacity by 10-15%

Occupancy

If the area regularly hosts more than two people (like a conference room or classroom), add 600 BTUs per additional person..

Need Help Sizing?

If you aren't sure which unit is right for your project, use our BTU Calculator or contact our USA-based support team for a custom recommendation.

Open BTU Calculator

Frequently Asked Questions

A: If your outdoor condenser connects to only one indoor unit, you typically require a "Single Only" board like the 17123000008577. If you have a multi-zone system with multiple indoor heads, you must use a "Multi Only" board to manage the complex communication between zones.

A: No. It is critical to match the voltage specifications. For example, the Electronic Control Box 17222000039289 is rated for X230 (230V). Using a board with incorrect voltage ratings can lead to immediate board failure or fire hazards.

A: While the Main Board handles general logic, the Inverter Module (e.g., 17122000062196) specifically converts incoming power to the variable frequency needed to run the DC inverter compressor at different speeds.

A: It depends on the part number. Some items are "Subassemblies" (just the board), while others, like the Electric Box Assy (10000100013), include the protective metal or plastic housing.

A: Control boards are programmed with specific firmware for different BTU capacities. A board for a 9k BTU unit (like the KFR26) has different logic parameters than one for a 70k BTU unit (the KFR70). Always match the part number exactly.