mypros+
Error code reference

LG Refrigerator Error Code R2 R3 R4 R5 ON

Freezer fan motor locked (F-FAN LOCKED).

LG codesLG refrigerator codes

Freezer fan motor locked (F-FAN LOCKED).

First step from the service manual

Check if something is locking the F-FAN.

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

MyPros+ Max

Get the full diagnostic procedure for R2 R3 R4 R5 ON.

  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
Get the full procedure

$29/month · Cancel anytime · Or $9.95 3-day pass

What R2 R3 R4 R5 ON means on a LG refrigerator

The R2 R3 R4 R5 ON error code on an LG refrigerator indicates that the freezer fan motor (F-FAN) has become locked, meaning the motor is no longer rotating as commanded by the control board. The freezer evaporator fan is responsible for circulating cold air from the evaporator coils throughout the freezer and refrigerator compartments. When the control board detects that the fan motor is not spinning or has stalled, it triggers this locked motor fault and displays the error code combination across the segment display.

The most immediate diagnostic step is to physically inspect the freezer fan for any obstruction that could be preventing blade rotation. Ice buildup around the fan blade or evaporator housing is a very common cause of this fault, particularly in units that have experienced a defrost system failure or a door seal leak. Food packaging, frost accumulation, or debris lodged against the fan blade can all mechanically lock the motor. If the obstruction is cleared and the fan still does not spin freely, the fan motor itself may have failed internally due to bearing wear or winding damage.

The fan motor receives voltage from the main control board, and a failure at the board level or in the wiring harness connecting the board to the motor can also produce this code. Technicians should verify that the motor is actually receiving the correct operating voltage before condemning the motor itself. If voltage is present at the motor connector but the motor does not run and spins freely by hand, motor replacement is indicated.

Source: manufacturer service documentation.

Common causes of R2 R3 R4 R5 ON

  1. 01

    Ice buildup blocking the fan blade

    Wiring / connection

    Frost or ice accumulation around the evaporator fan can physically prevent the blade from turning. Inspect the fan housing for ice obstruction, which is especially likely if the defrost system has also been malfunctioning.

  2. 02

    Foreign object obstructing the fan

    Wiring / connection

    Food packaging or other debris that has shifted into the fan area can mechanically lock the blade. Open the freezer back panel and visually inspect the area around the fan for any lodged objects.

  3. 03

    Failed freezer fan motor

    Part replacement

    The fan motor bearings or internal windings can fail over time, causing the motor to seize or stall under load. If the blade spins freely by hand but the motor does not run when powered, the motor has likely failed and needs replacement.

  4. 04

    Wiring harness fault

    Wiring / connection

    A damaged, corroded, or disconnected wire between the main control board and the fan motor can interrupt power delivery and cause the board to read the motor as locked. Inspect the harness connectors at both the motor and the board for damage or looseness.

  5. 05

    Main control board failure

    Part replacement

    If the control board is not sending the correct voltage to the fan motor, the motor will not run and the board will log a locked motor fault. This should be diagnosed only after ruling out mechanical obstructions and wiring issues.

See the test procedure for each cause

Frequently asked questions about R2 R3 R4 R5 ON

What does R2 R3 R4 R5 ON mean on a LG refrigerator?
This error code indicates that the freezer evaporator fan motor has been detected as locked, meaning it has stopped rotating. The freezer fan circulates cold air throughout both the freezer and fresh food compartments, so a locked fan will cause temperatures to rise throughout the unit. The first step is to check whether something is physically preventing the fan blade from spinning, such as ice or debris.
How do I fix the R2 R3 R4 R5 ON error on my LG refrigerator?
Start by unplugging the refrigerator and removing the freezer back panel to access the evaporator fan. Check for ice buildup or any obstructions around the fan blade and clear them if found. If the blade spins freely but the fan still does not run after restoring power, test for voltage at the motor connector and replace the motor if voltage is present but the motor does not operate.
Will resetting my LG refrigerator clear the R2 R3 R4 R5 ON error?
A power reset by unplugging the unit for a few minutes may temporarily clear the error code from the display, but the code will return if the underlying cause is not resolved. If the fan motor is mechanically obstructed or has failed, the fault condition will persist and the code will reappear once the refrigerator is powered back on and the control board checks motor operation.
Is it safe to keep using my LG refrigerator when the R2 R3 R4 R5 ON error is showing?
It is not advisable to continue using the refrigerator normally with this error active. A locked freezer fan means cold air is not being properly circulated, which will cause food temperatures to rise into unsafe ranges in both the freezer and refrigerator sections. The unit should be diagnosed and repaired promptly, and perishable food should be moved to another refrigerator in the meantime.
How much does it cost to repair the R2 R3 R4 R5 ON error on an LG refrigerator?
Repair costs vary depending on the root cause. If the issue is simply ice or debris obstructing the fan, there may be no parts cost involved. A replacement freezer evaporator fan motor typically runs in the range of $30 to $80 for the part alone, while professional labor to diagnose and replace the motor can bring the total to roughly $150 to $300 depending on your location and service provider.

Related LG refrigerator codes

All LG refrigerator codes
View all 485 LG refrigerator codes

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass