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Error code reference

LG Refrigerator Error Code 36E

FF Ice Bucket Heater Error

LG codesLG refrigerator codes

FF Ice Bucket Heater Error — Ice Bucket Heater detected as open due to connector slip-out, contact defect, or wire breakage.

First step from the service manual

Measure resistance between CN79 ORG and BRN on Main PCB; should be 135 ohm ±7%. 0 ohm = heater short, infinity = wire breakage or slip-out.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What 36E means on a LG refrigerator

The 36E error code on an LG refrigerator indicates a fault in the FF (French Door Freezer) ice bucket heater circuit. Specifically, the control system has detected an open circuit condition in the heater that is responsible for preventing ice from freezing solid inside the ice bucket assembly. This heater allows the ice maker to release cubes cleanly during harvest cycles. When the main PCB cannot confirm a proper heater circuit, it logs the 36E fault and may suspend normal ice maker operation to prevent mechanical damage.

The primary diagnostic step involves measuring resistance at connector CN79 on the Main PCB, across the orange (ORG) and brown (BRN) terminals. A properly functioning ice bucket heater should read 135 ohms, plus or minus 7% (approximately 125 to 145 ohms). A reading of zero ohms indicates a shorted heater element, while an infinite resistance reading confirms an open circuit, which is the most common presentation of this code. Open circuit readings point directly to a connector slip-out, a contact defect at the terminal, or a break somewhere along the wiring harness.

The three primary physical causes are connector separation at CN79, corroded or backed-out terminal contacts within the connector body, and a broken wire in the harness between the PCB and the heater. Connector slip-out is particularly common in this application because the ice bucket area is subject to repeated removal and reinstallation by users. Each time the bucket is pulled out, slight tension is placed on the wiring harness, which over time can loosen connector seating or fatigue individual wires near strain points.

Source: manufacturer service documentation.

Common causes of 36E

  1. 01

    Connector slip-out at CN79

    Wiring / connection

    The wiring connector at CN79 on the main PCB has partially or fully separated, breaking the circuit to the ice bucket heater. This is the most common cause and is confirmed by an infinite resistance reading at the CN79 ORG and BRN terminals. Reseating the connector fully resolves the fault.

  2. 02

    Terminal contact defect inside connector

    Wiring / connection

    Individual terminals within the CN79 connector body can back out, corrode, or lose spring tension, creating an intermittent or permanent open circuit even when the connector appears fully seated. Inspecting and reseating or replacing individual terminals is the corrective action.

  3. 03

    Broken wire in the harness

    Part replacement

    A wire in the harness between the main PCB and the ice bucket heater has fractured, typically near a bend point or strain relief. This produces an infinite resistance reading at CN79 and requires tracing the harness to locate the break. A harness repair or replacement is needed.

  4. 04

    Failed ice bucket heater element

    Part replacement

    The heater element itself has failed open internally. This also produces an infinite resistance reading at CN79 but is confirmed only after the wiring and connectors have been ruled out. The ice bucket heater assembly must be replaced.

  5. 05

    Shorted ice bucket heater

    Part replacement

    A zero-ohm reading at CN79 ORG and BRN indicates the heater element has shorted rather than opened. Though less common than an open circuit in 36E faults, a shorted heater requires replacement of the heater assembly and a check of the PCB output circuit for damage.

See the test procedure for each cause

Frequently asked questions about 36E

What does 36E mean on a LG refrigerator?
The 36E code on an LG refrigerator means the control board has detected an open circuit in the ice bucket heater. This heater keeps ice from clumping or freezing solid in the bucket so cubes can be dispensed normally. The fault is most often caused by a loose wiring connector rather than a failed heater. Resistance at connector CN79 should measure 135 ohms, plus or minus 7%, between the orange and brown terminals.
Can I fix the 36E error myself?
In many cases, yes. The most common cause is a connector that has slipped out of CN79 on the main PCB, which can be fixed by locating and firmly reseating the connector. If reseating the connector does not resolve it, a technician will need to trace the wiring harness for breaks or test the heater element resistance directly. Replacing a broken wire or the heater assembly requires moderate disassembly of the freezer door ice maker area.
Is it safe to keep using my refrigerator with a 36E error?
The refrigerator itself will continue to cool food normally while displaying 36E, so food safety is not immediately at risk. However, the ice maker may stop producing or dispensing ice correctly, and continued operation without repair can allow ice to freeze solid in the bucket and damage the auger or dispenser motor. Addressing the fault promptly avoids secondary mechanical damage.
Will resetting the refrigerator clear the 36E code?
A power reset may temporarily clear the 36E code from the display, but the fault will return as soon as the control board checks the ice bucket heater circuit again and detects the open condition. The underlying electrical issue, whether a loose connector, broken wire, or failed heater, must be physically repaired before the code will stay cleared.
How much does it cost to repair a 36E error on an LG refrigerator?
If the fix is simply reseating a loose connector at CN79, there is no parts cost and only a minimal service call fee if a technician is involved. If the ice bucket heater element needs replacement, parts typically range from $30 to $80 depending on the model, plus labor costs of $80 to $150 or more for a professional repair. Wiring harness repairs fall somewhere in between depending on the extent of the damage.

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