{"product_id":"lg-refrigerator-control-board-part-number-ebr78940610","title":"EBR78940610 LG OEM Refrigerator Main Control Board Replacement - EBR78940612","description":"\u003ch2\u003eWhat Is the EBR78940610 LG Refrigerator Main Control Board Replacement?\u003c\/h2\u003e\n\u003cp\u003eThe EBR78940610 is the genuine OEM main control board for LG refrigerators, mounted on a bracket behind an access panel on the lower back of the cabinet. It manages compressor and fan operation, temperature regulation, and the defrost cycle that keeps the fridge and freezer sections running correctly. This replacement control board restores those functions when the original fails. FailSafe Certified and backed by a 1-year warranty from Appliance Pro USA.\u003c\/p\u003e\n\u003cp\u003eEBR78940610 was a production update of this board and was later succeeded by EBR78940612 - both are the same control board at different points in the production run. If your unit's sticker reads EBR78940612 instead, that board is the correct match for your refrigerator.\u003c\/p\u003e\n\n\u003ch2\u003eWhat Does the EBR78940610 Fix on a LG Refrigerator?\u003c\/h2\u003e\n\u003cp\u003eIf your refrigerator is doing any of the following, the main control board is a common cause:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRefrigerator not cooling, or running too cold\u003c\/li\u003e\n  \u003cli\u003eControl panel is frozen or won't respond to input\u003c\/li\u003e\n  \u003cli\u003eUnit shuts off intermittently or loses power on its own\u003c\/li\u003e\n  \u003cli\u003eDisplay is showing an error code\u003c\/li\u003e\n  \u003cli\u003eCompressor or fans won't kick on\u003c\/li\u003e\n  \u003cli\u003eHeavy frost buildup because the defrost cycle isn't completing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese symptoms point to the refrigerator control board as the most likely cause - but appliances are complex systems, and the same symptoms can occasionally stem from a sensor, switch, wiring harness, or motor issue. If a technician has identified the control board, or you've ruled out those components yourself, this board is your fix. When in doubt, contact us before you order - we're happy to walk you through some troubleshooting, and a photo of your board is usually all we need. A diagnosis from a local appliance technician works too.\u003c\/p\u003e\n\n\u003ch2\u003eHow Do I Know If This Is the Right Board for My Refrigerator?\u003c\/h2\u003e\n\u003cp\u003ePull the refrigerator out, unplug it, and remove the lower rear access panel to find the board and its sticker. Match the number on that sticker to what you're ordering rather than going off the model number alone. EBR78940610 and EBR78940612 both refer to this same board. Your LG refrigerator part number is on the sticker on the original board - look for the EBR or CSP prefix.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOther part numbers used for this board:\u003c\/strong\u003e EBR78940612. Retailers and parts catalogs list the same board under these numbers.\u003c\/p\u003e\n\u003cp\u003eNot sure? Send us a photo of your board and its sticker before you order and we'll verify it for free - same business day.\u003c\/p\u003e\n\n\u003ch2\u003eCompatible Refrigerator Models\u003c\/h2\u003e\n\u003cp\u003eThis board is ordered by part number, not by appliance model. Send us your full model number and a photo of your board's sticker and we will confirm fitment before you buy - same business day.\u003c\/p\u003e\n\u003cp style=\"font-size:12px;color:#666666;border-left:3px solid #C8102E;padding-left:10px;margin:0;line-height:1.6;font-style:italic;\"\u003eThis model list is for reference only. LG may change boards between production runs, so two appliances with the same model number can use different boards. Always order by the part number printed on your original board - it is the only identifier that decides.\u003c\/p\u003e\n\n\u003ch2\u003eGenuine OEM - FailSafe Certified™ Reconditioned\u003c\/h2\u003e\n\u003cp\u003eEvery EBR78940610 board from Appliance Pro USA is a genuine OEM LG board restored to reliable working condition through the FailSafe Precision Protocol™, our 4-step recertification process built around what actually fails on this board:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFailure Pattern Analysis\u003c\/strong\u003e - We've mapped the failure signatures specific to this board, identifying which components degrade and fail over time.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTargeted Component Replacement\u003c\/strong\u003e - The components this board is known to lose are replaced before they get the chance to fail.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProactive Rebuild Standard\u003c\/strong\u003e - Known high-failure components are replaced with new parts on every board, regardless of whether they show a problem yet. Degraded parts don't ship.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinal Certification\u003c\/strong\u003e - Every board is tested and certified to our internal FailSafe Precision Protocol standard for function and lifespan before it ships.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eGenuine OEM LG main control board - not an aftermarket copy\u003c\/li\u003e\n  \u003cli\u003eFailSafe Certified before it ships\u003c\/li\u003e\n  \u003cli\u003eDirect fit replacement, no soldering or modification needed\u003c\/li\u003e\n  \u003cli\u003eMinor cosmetic wear may be present due to prior installation - it does not affect performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eBoard Type and Function\u003c\/h2\u003e\n\u003cp\u003eThis is the brain of the refrigerator's cooling system. It reads input from the temperature sensors and tells the compressor and fans when to run, manages the defrost heater on a schedule, and shifts between cooling modes to keep both compartments at the right temperature. When it fails, the refrigerator can lose cooling control entirely, get stuck running constantly, or stop responding to the display altogether.\u003c\/p\u003e\n\n\u003ch2\u003eCommon LG Refrigerator Error Codes\u003c\/h2\u003e\n\u003cp\u003eIf your LG refrigerator is displaying an error code, the table below describes what it typically indicates. Codes marked \u003cstrong style=\"color:#C8102E;\"\u003e★\u003c\/strong\u003e are most directly associated with main control board failure. These are general LG codes and can vary by your exact model. Always confirm the exact meaning in your model's owner's manual or service guide before ordering any part.\u003c\/p\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:13px;margin-bottom:12px;\"\u003e\n\u003ctr style=\"background-color:#0B1F3A;\"\u003e\n\u003ctd style=\"width:22%;padding:7px 10px;color:#ffffff;font-weight:bold;\"\u003eCode\u003c\/td\u003e\n\u003ctd style=\"padding:7px 10px;color:#ffffff;font-weight:bold;\"\u003eWhat It Means\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color:#f9f9f9;\"\u003e\n\u003ctd style=\"padding:7px 10px;font-weight:bold;color:#C8102E;border:1px solid #e0e0e0;\"\u003e★ CO\u003c\/td\u003e\n\u003ctd style=\"padding:7px 10px;color:#333333;border:1px solid #e0e0e0;\"\u003eCommunication failure between main control board and display board\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 10px;font-weight:bold;color:#C8102E;border:1px solid #e0e0e0;\"\u003e★ Er CF \/ CF\u003c\/td\u003e\n\u003ctd style=\"padding:7px 10px;color:#333333;border:1px solid #e0e0e0;\"\u003eCondenser fan feedback signal error - board not receiving fan confirmation signal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color:#f9f9f9;\"\u003e\n\u003ctd style=\"padding:7px 10px;font-weight:bold;color:#C8102E;border:1px solid #e0e0e0;\"\u003e★ 22\u003c\/td\u003e\n\u003ctd style=\"padding:7px 10px;color:#333333;border:1px solid #e0e0e0;\"\u003eCompressor relay problem - board-managed compressor circuit fault\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 10px;font-weight:bold;color:#C8102E;border:1px solid #e0e0e0;\"\u003e★ dH\u003c\/td\u003e\n\u003ctd style=\"padding:7px 10px;color:#333333;border:1px solid #e0e0e0;\"\u003eDefrost cycle timed out - evaporator did not reach target temperature within 1 hour\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color:#f9f9f9;\"\u003e\n\u003ctd style=\"padding:7px 10px;font-weight:bold;color:#333333;border:1px solid #e0e0e0;\"\u003eEr FF\u003c\/td\u003e\n\u003ctd style=\"padding:7px 10px;color:#333333;border:1px solid #e0e0e0;\"\u003eFreezer evaporator fan failure - fan not circulating cold air in freezer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 10px;font-weight:bold;color:#333333;border:1px solid #e0e0e0;\"\u003eEr rF\u003c\/td\u003e\n\u003ctd style=\"padding:7px 10px;color:#333333;border:1px solid #e0e0e0;\"\u003eRefrigerator evaporator fan failure - fan not circulating air on fresh food side\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color:#f9f9f9;\"\u003e\n\u003ctd style=\"padding:7px 10px;font-weight:bold;color:#333333;border:1px solid #e0e0e0;\"\u003eEr FS\u003c\/td\u003e\n\u003ctd style=\"padding:7px 10px;color:#333333;border:1px solid #e0e0e0;\"\u003eFreezer temperature sensor failure\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 10px;font-weight:bold;color:#333333;border:1px solid #e0e0e0;\"\u003eEr rS \/ r2\u003c\/td\u003e\n\u003ctd style=\"padding:7px 10px;color:#333333;border:1px solid #e0e0e0;\"\u003eRefrigerator temperature sensor failure - upper (rS) or lower (r2) section\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color:#f9f9f9;\"\u003e\n\u003ctd style=\"padding:7px 10px;font-weight:bold;color:#333333;border:1px solid #e0e0e0;\"\u003edS\u003c\/td\u003e\n\u003ctd style=\"padding:7px 10px;color:#333333;border:1px solid #e0e0e0;\"\u003eDefrost temperature sensor short or disconnection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 10px;font-weight:bold;color:#333333;border:1px solid #e0e0e0;\"\u003eEr IF \/ IS \/ It\u003c\/td\u003e\n\u003ctd style=\"padding:7px 10px;color:#333333;border:1px solid #e0e0e0;\"\u003eIce maker fan (IF), temperature sensor (IS), or motor (It) failure\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color:#f9f9f9;\"\u003e\n\u003ctd style=\"padding:7px 10px;font-weight:bold;color:#333333;border:1px solid #e0e0e0;\"\u003eCH E \/ CL E\u003c\/td\u003e\n\u003ctd style=\"padding:7px 10px;color:#333333;border:1px solid #e0e0e0;\"\u003eRefrigerant leak detected - high-side (CH E) or low-side (CL E). Requires professional service\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 10px;font-weight:bold;color:#333333;border:1px solid #e0e0e0;\"\u003eOF F\u003c\/td\u003e\n\u003ctd style=\"padding:7px 10px;color:#333333;border:1px solid #e0e0e0;\"\u003eDemo mode active - cooling disabled. Not an error. Deactivate via control panel hold sequence\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003cp style=\"font-size:12px;color:#666666;border-left:3px solid #C8102E;padding-left:10px;margin:0;line-height:1.6;font-style:italic;\"\u003eError code definitions vary by LG model series. Always confirm the exact meaning in your refrigerator's owner's manual or service guide before purchasing any part.\u003c\/p\u003e\n\u003cp style=\"font-size:12px;color:#666666;margin:8px 0 0 0;font-style:italic;\"\u003e★ = Most directly associated with main control board failure\u003c\/p\u003e\n\n\u003ch2\u003eHow to Install a LG Refrigerator Main Control Board\u003c\/h2\u003e\n\u003cp\u003eShut off power at the breaker or unplug the unit before you start. Remove the screws holding the lower rear access panel and set it aside to expose the board. Take a photo of the wiring harness before you disconnect anything, then release each connector's locking tab with a flathead screwdriver and pull it free. Handle the new board by its edges, seat it in the mounting clips, and reconnect each harness exactly where it came from. Reinstall the access panel, restore power, and most people are done in under 30 minutes with basic hand tools. Give the refrigerator a few hours to settle into its temperature cycle before you judge whether the repair worked.\u003c\/p\u003e\n\n\u003ch2\u003eShipping\u003c\/h2\u003e\n\u003cp\u003eEvery board is physically in stock - no backorders, no drop shipping. Orders placed before 4:00 PM EST ship the same business day. Tracking provided on every order.\u003c\/p\u003e\n\n\u003ch2\u003eWarranty\u003c\/h2\u003e\n\u003cp\u003eBacked by a 1-year warranty from Appliance Pro USA (registration required - the card is in the box). If the board fails due to a defect within the warranty period, we'll repair or replace it at no charge (shipping fees may apply). Warranty coverage is determined at Appliance Pro USA's discretion. Boards that have been tampered with, or with the verification seal (hologram or tamper-evident sticker) removed or damaged, are not eligible for warranty coverage. Damage caused by improper installation, electrical surges, or physical damage is not covered.\u003c\/p\u003e\n\n\u003ch2\u003eReturns\u003c\/h2\u003e\n\u003cp\u003eReturns are accepted within 30 days of delivery. Boards that are unopened and uninstalled, in original condition with the verification seal (hologram or tamper-evident sticker) intact, qualify for a full refund. If the board has been opened or installed, contact us before sending it back with a photo of the board you received, the reason for the return, and a photo of your original board's part-number label so we can verify fitment and approve the return. Boards returned used, altered, damaged, or with the verification seal missing may receive a partial refund in line with our return policy. Exchanges for the correct part are always available.\u003c\/p\u003e\n\u003cp\u003eNot sure it's the board? Before you order, and before you return, contact us. We offer free troubleshooting help and can usually tell from a photo of your board and its symptoms whether this is the right part. Only a technician can fully diagnose your appliance.\u003c\/p\u003e","brand":"Appliance Pro USA","offers":[{"title":"Default Title","offer_id":50891506909270,"sku":"EBR78940610","price":229.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0619\/1339\/9382\/files\/ebr78940610-lg-refrigerator-control-board-front.jpg?v=1792868212","url":"https:\/\/applianceprousa.com\/products\/lg-refrigerator-control-board-part-number-ebr78940610","provider":"Appliance Pro USA","version":"1.0","type":"link"}