EBR64173902 LG Refrigerator Inverter Board Guide: Linear Compressor Flash Codes, Sibling Board Confusion and Compatibility
Your LG refrigerator has stopped cooling while the lights, the display and the fans all carry on as though nothing is wrong. Part EBR64173902 is the LG power control assembly that carries the inverter drive for the linear compressor on a group of LFX, LMX and Kenmore Elite 795.71 French door refrigerators, and it is one of the parts most often bought on a guess. This guide separates what the board reports from what the compressor reports, so you can decide before you spend.
What Are the Signs of a Failing EBR64173902 on an LG French Door Refrigerator?
Commonly reported signs of an EBR64173902 fault are a compressor that never starts while lights, fans and the display behave normally, a repeating click or short hum from the machine compartment, cooling that returns briefly after a power cycle then quits, and an LED on the board repeating a fixed count of flashes with a pause between groups.
The pattern that sets a drive fault apart from most other refrigerator faults is how normal everything else looks. The cabinet is lit, the panel responds, the fans turn, and nothing gets cold. If some of the following describe your unit, the compressor circuit is worth investigating before anything else.
- Neither compartment cools while the interior lights, the panel and the fans all behave normally
- A repeating click or a short hum from the machine compartment every few minutes as a start attempt is made and abandoned
- The condenser fan turns steadily with no compressor running behind it
- An LED on the board itself repeats a fixed number of flashes, pauses, then repeats the same count
- Cooling returns for a few minutes after the unit is unplugged and plugged back in, then stops again
- Frost clears from the evaporator on schedule while cabinet temperatures keep climbing, so defrost is working and the compressor is not
- Temperatures drift up over a day or two rather than failing all at once
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Where Is the Part Number Printed on This LG Inverter Board? Watch the Video
The identifying number on an EBR64173902 is on a label applied to the board, not the number screened into the circuit board itself. Unplug the refrigerator, remove the cover over the board on the back of the cabinet, and read the EBR number from the label before ordering any replacement.
This short video shows how to find and read the label on an appliance control board and how to confirm the part before the packaging is opened. The same method applies here, with one extra step worth taking on this board: read the EBR number from the label rather than the number screened onto the circuit board, because neighbouring variants carry the same screened number. General installation guidance is included in the Quick Start Guide shipped with every order.
Which EBR64173902 Symptoms Point at the Drive, and Which Point at the Compressor?
On this platform a no-cool fault splits two ways. A drive that produces no output, reports an internal power module fault, or loses communication points at the EBR64173902. A stroke overrun, a locked piston, an open winding or a current trip is the drive reporting something it measured out at the compressor or in the sealed system.
Read the table as a sorting exercise rather than a verdict. The single most expensive mistake available here is treating everything the board reports as a fault in the board, when much of what it reports is a measurement taken somewhere else.
| Symptom | What It May Indicate | Recommended Next Step | Board? |
|---|---|---|---|
| Nothing cools, everything else behaves normally | No start command reaching the compressor | Watch the board LED for several minutes and note the flash count and the gap between attempts before touching anything | Common |
| Repeating click every few minutes from the machine compartment | A start attempt made, then abandoned by a protection trip | Note which flash count follows the click. Counts tied to piston travel or current belong to the compressor side | Possible |
| Condenser fan turning with the compressor silent | The cooling call is being made, the drive output is not arriving | Confirm the compressor terminals and harness before the board, since an open winding produces the same silence | Check the compressor first |
| Cooling returns after a power cycle, then quits again | A protection trip re-arming on each power up | Leave the unit running and log how long it lasts and what the LED reports when it stops | Possible |
| No LED activity at all with supply confirmed at the board | No low voltage rail on the drive | Confirm the incoming supply at the board connector. Supply present with nothing on the board is commonly associated with the drive | Common |
| Frost clears normally while temperatures climb | Defrost circuit healthy, compressor circuit not | Rule the defrost side out of your thinking entirely and work the compressor circuit | Possible |
| Loud buzz or strain, then silence, repeating | Piston travel restrained, or a high starting load | The compressor and the sealed system come first here. A drive reporting restraint is usually reporting it accurately | Compressor and sealed system |
What Do the Flashing LED Patterns on the EBR64173902 Actually Report?
The EBR64173902 reports through an LED on the board rather than through the panel, repeating a fixed count of flashes with a pause between groups. Published tables for LG linear compressor drives disagree on the flash count for each fault, some counting from zero and some from one, so read the fault names rather than trusting a count found elsewhere.
Two things about this readout are worth knowing before you count anything. First, the fault set below is consistent across the documentation for LG linear compressor drives, but the flash count attached to each fault is not, because some service data counts the first entry as zero flashes and other data counts it as one. Second, several of these faults come with a built in wait before the drive tries again, documented on this family from roughly twenty seconds up to about two and a half minutes, so a unit that looks dead may simply be inside its own waiting period. Use the fault names, then confirm the counts against your model's instructions.
| Reported fault | What It May Indicate | Is It This Board? |
|---|---|---|
| Compressor voltage or current out of range | The drive measured supply or output outside the window it expects. Published as the lowest count in every version of this table, though whether that is written as zero flashes or one flash depends on the documentation. Supply and wiring come before the drive. | Possible |
| Piston stroke overrun | The linear compressor's piston travelled further than the drive commanded. Frequently reported alongside a loose or corroded compressor connection, so the harness and the terminals are the first stop. | Compressor circuit first |
| Locked or restrained piston | A start was commanded and the movement the drive expected did not follow. On a linear compressor this points at the compressor or at the load the sealed system is placing on it far more often than at the drive. | Compressor first |
| Open circuit in the compressor circuit | A winding or a connection reading open. Measure across the compressor terminals and inspect the plug before the board is considered at all. | Not the drive |
| Current trip or overload | Current climbed past the protection threshold. A blocked condenser, a stalled condenser fan, high ambient temperature and a sealed system restriction all raise current without any board fault. | Check the cooling load |
| Internal power module fault | The power stage inside the drive reported a fault in itself. This is the entry that sits on the board rather than out at the compressor, and it is the pattern most directly associated with replacing this part. | Board-related |
| Communication fault with the control system | The drive and the rest of the control system stopped exchanging data. Reseat the harness at both ends and inspect the pins, then either the drive or the board it talks to can be responsible. | Board or harness |
What Should You Test Before Deciding the EBR64173902 Is the Problem?
Before ordering an EBR64173902, measure the compressor windings and inspect the terminals, confirm the condenser coil is clear and the condenser fan turns freely, reseat every connector at the drive and at the compressor, and allow the drive its full protection interval before concluding it is not attempting a start.
Stroke, restraint and open circuit reports all originate at the compressor. The drive is describing what it measured, and replacing it will not change a measurement taken past its output. This is the single most common reason a drive gets replaced without fixing anything.
Current trips and overload reports are frequently the drive protecting itself from a cooling load it cannot satisfy rather than a fault in its own circuitry. A packed condenser or a fan that has stopped turning raises current on a perfectly healthy drive.
A connector that looks seated but is not fully home produces reports that are indistinguishable from a failing drive, and the machine compartment is a warm, dusty place for a connection to live. Corroded or discoloured pins are commonly reported on units of this age.
After several of the documented trips the drive deliberately waits before trying again, and on this family those intervals run from a matter of seconds to a couple of minutes. A unit watched for thirty seconds can look completely dead when it is simply counting down.
How Hard Is the EBR64173902 to Replace, and Where Does the Board Sit?
Replacing the EBR64173902 is a moderate repair most people complete in about 20 to 35 minutes. The board sits on the back of the cabinet under a cover held by a small number of screws. Photographing every connector before disconnecting anything is the step that prevents most reinstallation problems.
Service documentation for this family describes the board cover on the back of the cabinet coming off after a small number of screws are loosened, with the harness disconnected before the board is lifted out. Photograph every connector before anything is unplugged. On some production runs more than one board shares the space behind that cover, which is exactly why the label on your existing board, rather than its position in the housing, is what you match against. If you are not comfortable working around a compressor circuit, a qualified appliance technician is always the right call.
How Do You Confirm the EBR64173902 Is the Right Board for Your Model?
Confirm an EBR64173902 by reading the EBR number from the label on your existing board rather than the number screened onto the circuit board, because neighbouring variants in this family carry the same screened number. A model number lookup is a starting point, since LG used more than one board across production runs of the same model.
Model Number Check
Enter your refrigerator's model number to check it against our EBR64173902 compatibility records. Not found? Use the buttons below to reach our team directly.
There are two numbers on this board and only one of them identifies it. The number screened onto the circuit board is shared with neighbouring assemblies in the same family, so it will not tell you which variant you are holding. The EBR number on the applied label is the one that matters. Click the image to zoom in.
Which Refrigerator Models Was the EBR64173902 Built For?
The EBR64173902 is listed for LG LFX25978 and LFX28978 French door refrigerators, LMX25988 and LMX28988 four door models, a group of GR-L export variants, and Kenmore Elite 795.71 refrigerators built by LG. Verify by reading the label on your existing board, since production runs of the same model did not all use the same board.
LFX Series, French Door
LMX Series, Four-Door French Door
GR-L Series, Export and International Variants
Kenmore Elite 795.71 Series, LG Built
This list is drawn from cross-reference records and is provided as general guidance only. LG used more than one board across production runs of these models, and the neighbouring EBR64173901 and EBR64173903 assemblies serve different model runs in the same families, so we do not treat any of the three as an assumed substitute for another. Always confirm by reading the label on your existing board before ordering. If your model is not listed, or you are unsure, contact our team and we will help confirm before you buy.
How Is the EBR64173902 Restored to Spec? The FailSafe Precision Protocol
Every EBR64173902 sold by Appliance Pro USA goes through the FailSafe Precision Protocol, a proprietary 4-step process covering failure pattern analysis, precision diagnostic testing, proactive component replacement using equal or higher-rated parts, and final certification before the board ships.
FailSafe Precision Protocol
Failure Pattern Analysis
Known failure patterns for the EBR64173902 are mapped before any board enters the process, so we know exactly which components to focus on for this specific board type.
Precision Diagnostic Testing
Multi-point diagnostic testing identifies faults and confirms overall board condition. Boards that do not pass diagnostic testing do not advance.
Proactive Component Replacement
Components identified through failure pattern analysis as common weak points are replaced using equal or higher-rated parts, before the board is cleared to ship.
Final Certification
Certified to meet or exceed original LG factory specifications. Tamper-evident hologram applied. Anti-static packaged and sealed for shipping.
EBR64173902 Specifications and Cross-Reference Part Numbers
The EBR64173902 is an LG power control assembly carrying the inverter drive for a linear compressor, mounted under a cover on the back of the cabinet, with an LED on the board reporting compressor circuit faults. It cross-references to AP4672006, PS3533995, AH3533995, EA3533995 and 2443731, and is listed as discontinued by several supply channels.
| Manufacturer Part Number | EBR64173902 |
| Board Type | Power control assembly carrying the compressor inverter drive for this platform. Cataloged variously as a compressor control board, a power control board and an inverter board, all describing the same assembly. |
| Compressor System | LG linear compressor driven by an inverter stage rather than a fixed speed start relay. Service data for this family designates the drive an E-Inverter. |
| Board Location | Back of the cabinet, under a board cover retained by a small number of screws. More than one board may share the space on some production runs. |
| Onboard Diagnostics | An LED on the board repeats a fixed flash count for the compressor circuit, with a protection wait before each retry. Flash count conventions differ across published tables, so confirm against your model's service documentation. |
| Number Screened on the PCB | EAX61528402. This number is shared with neighbouring assemblies in the same family and does not identify the variant on its own. |
| Cross-Reference Numbers | EAX61528402, AP4672006, PS3533995, AH3533995, EA3533995, 2443731 |
| Related Assemblies | EBR64173901 and EBR64173903 are separate variants serving different model runs. EBR65002703 and EBR65002710 appear alongside this number in service documentation for the same model families as assemblies used in other production runs. None of these is treated here as a confirmed substitute. |
| OEM Availability | Listed as discontinued and no longer supplied by several parts channels, while others still show stock. Appliance Pro USA supplies FailSafe Certified units. |
| APU Status | In Stock, FailSafe Certified, 1-year warranty (registration required), same-day shipping* |
Is It Worth Repairing This Refrigerator? What the EBR64173902 Costs Against the Alternatives
Replacing the EBR64173902 is typically far less than a comparable new LG French door refrigerator, which commonly runs $1,800 or more, and less than a technician visit that commonly runs $350 to $600 including parts. Figures are general estimates that vary by region, provider and circumstance.
What your options typically cost
The Refrigerator Still Is Not Cooling After Fitting the EBR64173902. What Now?
The most commonly reported reasons a refrigerator does not cool straight after an EBR64173902 replacement are judging the result before the drive has finished its protection interval, a compressor or harness connector that is seated but not fully home, and evaluating cabinet temperature before the unit has had hours to pull down.
Let the drive finish its waiting period before you judge it
This drive does not always attempt a start the moment power arrives. Several of its documented protection states hold it off for a period first, and on this family those periods run from seconds to a couple of minutes. A new board watched for thirty seconds can look exactly like the old one.
Reseat every connector at the drive and at the compressor
A connector that looks home but has not fully clicked in reproduces the original symptom perfectly, and this is a warm, dusty part of the cabinet. Disconnect each one in turn and press it home until it clicks, then check the compressor plug at the other end of the run as well.
Give the cabinet time to pull down
A refrigerator that has been warm needs hours, not minutes, to reach operating temperature once the compressor is running again, and the ice maker takes longer still. Some noise from the machine compartment as the drive ramps the compressor up is normal on this platform.
Handle the board by its edges and wear the install gloves
Static discharge during handling is a common cause of damage to replacement electronics. Touch the metal cabinet frame before you pick the board up, wear the install gloves included in the box, and hold the board by its edges rather than across its face.
Still not working after all of the above?
Contact our team before returning anything. A brief conversation resolves the majority of post-install situations. We stand behind every board we sell and are here to help you get the result you need.
Which Other Parts on This LG Platform Produce the Same No-Cool Pattern?
Parts that produce the same no-cool pattern as an EBR64173902 fault include the linear compressor itself, the compressor wiring harness and its connectors, the condenser fan motor and a blocked condenser coil, and a sealed system restriction or leak. Each can be reported by the drive as a fault it measured elsewhere.
Share your model number and a photo of your existing board's sticker. Our team will help confirm the right part before you spend a dollar. No pressure, no obligation.
Why Buy the EBR64173902 from Appliance Pro USA?
Appliance Pro USA supplies the EBR64173902 as a genuine OEM board restored through the FailSafe Precision Protocol to meet or exceed OEM specifications, backed by a 1-year warranty (registration required), a 30-day return policy, free priority shipping, and same-day shipping on orders placed before 4 PM EST, Monday through Friday.
At Appliance Pro USA, we specialize in high-quality reconditioned replacement control boards, professionally inspected and tested to meet or exceed OEM specifications. Every board we sell undergoes our FailSafe Precision Protocol, meaning components identified through failure pattern analysis as common weak points are replaced proactively using equal or higher-rated parts before the board ever ships to you. With a replacement board from Appliance Pro USA, you're getting a board that's been evaluated and restored to reliable working condition, backed by our 1-year limited warranty (registration required) and 30-day return policy, so you can order with complete confidence.
We offer free priority shipping on every order, and orders placed before 4 PM EST ship same day, Monday through Friday, excluding holidays and scheduled closures. Whether you're a homeowner tackling this repair yourself or a professional technician who needs a reliable source, we're here to help you get the right part and get the job done right the first time.
Not sure this is your board? Send us a photo of your original board's part number sticker and we'll confirm before you buy. Reach us at info@applianceprousa.com
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EBR64173902 LG Refrigerator Inverter Board, Frequently Asked Questions
Common questions about the EBR64173902 cover why two boards in the family carry the same printed number, whether the neighbouring EBR64173901 and EBR64173903 can be substituted, what a two flash pattern points at, whether digits on the panel are a fault code, and what the discontinued listing status means.
Two boards in this family carry the same number screened on the circuit board. How do I tell which one I actually have?
Read the applied label, not the screening. The number screened onto the bare circuit board in this family is shared across more than one finished assembly, so on its own it cannot tell you whether you are holding an EBR64173902 or one of its neighbours. The EBR number printed on the label applied to the board is the one that identifies the variant. If the label is missing, damaged or unreadable, which is common on a board that has been warm for a decade, send us a photograph of the board and your full model number and we will work it out with you before you order rather than after.
The EBR64173901 and EBR64173903 look almost identical to this board. Can I fit one in place of the other?
We do not present them as substitutes, and we would not advise treating them as such without confirmation. All three sit in the same family and share the same screened circuit board number, but the model runs they are listed against are different: the neighbouring numbers appear against other LFX, LFC and LMX series and other Kenmore Elite ranges rather than the ones on this page. Boards that share a family can still differ in configuration or in what they expect from the harness. Match the EBR number on your label, and if the number you read is not the one on this page, ask us before ordering.
The LED on my board flashes twice and then pauses. Does that tell me the board has failed?
It usually tells you the opposite. A low flash count on this family is commonly documented as a report about piston travel in the linear compressor, meaning the drive commanded a start and the movement it measured was not what it expected. That is a measurement taken past the drive's output, so the compressor terminals, the windings and the harness are what to examine first. There is a second complication worth knowing: published tables for LG linear compressor drives do not agree on the counting method, with some data starting the same list at zero flashes and other data starting it at one. Confirm both the count and the counting method against your model's service documentation before spending anything.
A pair of digits appeared on the panel after someone pressed a button behind the cabinet. Is that a fault code?
Probably not. This platform has a service test button that forces run states for diagnosis, and pressing it repeatedly steps through those states rather than clearing anything. On some units one of those states closes the damper and puts a pair of digits on the panel, which is the unit telling you which test it is in rather than reporting a fault. Power the refrigerator down, let it settle, and start your diagnosis again from a normal state. The readout that matters for this board is the flash pattern on the board itself, not digits on the front panel.
Some listings show this board as discontinued. Does that change how I should approach the repair?
It changes the stakes rather than the method. Several supply channels list the EBR64173902 as no longer produced while others still show stock, which is the usual picture for a board of this vintage. Practically, it means buying on a guess is a worse idea than it would be for a current part, because the wrong purchase is harder to correct later. It also means the diagnosis work described on this page is worth doing properly first. Appliance Pro USA supplies the board restored to spec under the FailSafe Precision Protocol with a 1-year warranty (registration required) and a 30-day return policy.
The compressor was replaced recently and the board is still reporting a fault. Where should I look?
Start at the joint between the two, because that is what changed. A compressor replacement means the compressor plug, the harness routing and the earth path were all disturbed, and a connector that is seated but not fully home will have the drive reporting the same faults it reported before. Check that the correct compressor was fitted for this drive, that the terminals are clean and firmly connected, and that nothing is chafing where the harness was re-routed. If the drive is reporting an internal power module fault rather than a compressor measurement, that is the point where this board becomes the likely answer.
Which Help Center Guides Support This Inverter Board Repair?
These Appliance Pro USA Help Center guides explain what a refrigerator control board does, why boards fail, how to identify the right board from a part number, what to check when an appliance does not work straight after a board replacement, and which tools the job needs.
Ready to order the EBR64173902?Available now at Appliance Pro USA, backed by our 1-year warranty (registration required) and 30-day return policy.
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