EcoSmart Appliance Parts Refrigerator Main Control Board
Part Number EBR78940508

EBR78940508 OEM LG Refrigerator Main Control Board Replacement

Professional EcoSmart replacement board for LG refrigerators. OEM part number EBR78940508 — professionally rebuilt, tested, and ready to install.

What You Are Getting

An EcoSmart replacement LG refrigerator main control board, part number EBR78940508, rebuilt by EcoSmart Appliance Parts. We tear these boards down, diagnose every failure point specific to this part number, fix what failed, and put them back together right — so you get a reliable OEM board without paying new OEM prices.

Check what a new EBR78940508 retails for — then look at our price. That gap is real, and it is yours to keep. Same board, same performance, professionally rebuilt. A win for your wallet and a win for the planet.

Is This Causing Your Problem?

The EBR78940508 LG refrigerator main control board is the root cause behind these error codes and symptoms:

• Er FF — fan circuit failure, main board controls fan circuits
• Er rF — refrigerator fan fault, control board is primary driver
• Er dH — defrost heater fault, board-controlled circuit
• Er CO — communication error between board and components
• Er 1F — freezer fan fault, board-controlled
• CF — cooling failure, direct board-controlled fault
• Not Cooling — no error code but refrigerator not cooling — board failure often produces no code

If you are seeing any of these on your LG refrigerator, the EBR78940508 control board is the most likely fix.

How We Rebuild It

• Teardown and fault diagnosis — we track down the known failure points specific to EBR78940508
• Targeted component repair — we fix what is wrong and replace what is worn, no guessing, no skipping
• Function tested — verified before it ships
• ESD anti-static packaging — heat-sealed so it arrives the way it left

Minor cosmetic signs of prior use may be visible — normal for an EcoSmart replacement part and will not affect performance.

Make Sure This Is Your Part

Find the white part number sticker on your currently installed board. It needs to say EBR78940508. Your refrigerator model number alone is not enough — the same model can ship with different board revisions depending on when it was manufactured.

Not sure? Send us a photo of your board label — we will confirm the fit before you spend anything.

Compatible LG Refrigerator Models

To confirm this is the correct board for your refrigerator, locate the white part number sticker on your currently installed control board and verify it reads EBR78940508.

Model numbers above are a starting point, not a guarantee. LG can change board revisions during a model production run — meaning the same refrigerator model number may have shipped with a different board depending on when it was built. The only way to be 100% certain is to locate the white part number sticker on your currently installed board and confirm it reads EBR78940508. That sticker is the final word — not the model number.

Shipping

In stock and ready to ship. Orders placed Monday through Friday before 3:00 PM MT go out same day. All other orders — including weekends and holidays — ship the next business day. Expedited 2-day shipping available at checkout for time-sensitive repairs. We do not ship to Alaska, Hawaii, or US territories.

Warranty

6 months. If it fails on our end, we make it right. No drama, no runaround — we got you. Not covered: wrong installation, power surges, physical damage.

Returns

30 days. Board needs to come back the way it left. If it has been opened or installed, a restocking fee may apply — anywhere from 10 to 50 percent depending on condition. Nothing sneaky, just honest about how it works.

Frequently Asked Questions

Will this board fit my refrigerator?

It will fit if your original board has the part number EBR78940508 on the white sticker on the board itself. Do not rely on your refrigerator model number alone — the same model can use different board revisions depending on production run. If you are not sure, contact us with a photo of your board label before ordering.

What does EcoSmart replacement mean?

It means we have gone through the board, tracked down what failed, fixed it, and verified it works. Every board goes through a targeted repair process focused on the known failure points for EBR78940508 specifically — not a generic once-over. When it leaves us it has been rebuilt to do its job reliably.

How do I find my part number?

Look for a white sticker or barcode label on your currently installed control board. It will show a part number like EBR78940508 — that is what you are matching. On most LG refrigerators the main control board is located at the back of the unit or behind an interior panel. If you need help locating it, contact us.

What if it does not fix my refrigerator?

If the board fails within 6 months due to a defect on our end, we make it right — no hassle. If it turns out you ordered the wrong part number, return it within 30 days and we will waive the restocking fee on an exchange. You cover return shipping and we will work with you to get the right board out fast.

How long does shipping take?

Orders placed Monday through Friday before 3:00 PM MT ship same business day. All other orders ship the next business day. Standard delivery reaches most US customers in 2 to 5 business days. Expedited 2-day shipping available at checkout. We do not ship to Alaska, Hawaii, or US territories.