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Error code reference

Daewoo Freezer Error Code FG

F-Fan FG signal is less than 500 RPM; retry operation performed more than 10 times results in FG error output.

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F-Fan FG signal is less than 500 RPM; retry operation performed more than 10 times results in FG error output.

First step from the service manual

Measure the DC volts output to the fan at Main PCB CN14 Pins 3 & 4 (normal is 11-13 VDC); then measure the frequency between PIN 4 and 6 of CN14 — if FG signal is below 50Hz and no fan blade obstruction, replace the fan motor.

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

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What FG means on a Daewoo freezer

The FG error code on a Daewoo freezer indicates that the evaporator fan motor's feedback signal (the FG signal) has dropped below 500 RPM. The FG signal is a frequency-based pulse output generated by the fan motor that the main PCB uses to monitor actual fan speed. When the control board detects this signal is too low or absent, it initiates an automatic retry sequence. If the retry is performed more than 10 consecutive times without the fan recovering to an acceptable speed, the board locks in the FG error output and displays the fault code.

Diagnosing this fault begins at connector CN14 on the main PCB. Technicians should measure DC voltage at pins 3 and 4 of CN14, with a normal reading falling between 11 and 13 VDC. This confirms whether the board is supplying adequate power to the fan motor. The next step is measuring the frequency signal between pins 4 and 6 of CN14. A healthy fan motor produces an FG signal above 50 Hz at operating speed. If the frequency reading falls below 50 Hz and the fan blade is confirmed to be free of obstructions or ice buildup, the fan motor itself is the likely failed component and should be replaced.

Common root causes include a seized or worn fan motor, ice accumulation blocking the fan blade, wiring harness damage between CN14 and the motor, or a failed main PCB that is not delivering proper voltage to the fan circuit. Because the control board performs automatic retries before latching the error, intermittent conditions such as partial ice obstruction can also trigger this code before a complete mechanical failure occurs.

Source: manufacturer service documentation.

Common causes of FG

  1. 01

    Failed or seized fan motor

    Part replacement

    The fan motor's internal bearings can wear out or seize, causing the motor to stop spinning or spin below the minimum 500 RPM threshold. This is confirmed when voltage at CN14 pins 3 and 4 reads 11 to 13 VDC but the FG frequency signal between pins 4 and 6 is below 50 Hz.

  2. 02

    Ice obstruction blocking the fan blade

    Wiring / connection

    Ice buildup around the evaporator fan blade can physically prevent the blade from spinning freely, dragging the RPM below the acceptable threshold. Inspect the fan compartment for frost or ice accumulation and defrost the unit before replacing any parts.

  3. 03

    Insufficient voltage from the main PCB

    Part replacement

    If the voltage measured at CN14 pins 3 and 4 is outside the 11 to 13 VDC normal range, the main PCB may not be supplying adequate power to drive the fan motor. This points to a board-level fault rather than the motor itself.

  4. 04

    Damaged wiring harness or connector at CN14

    Wiring / connection

    Broken wires, corroded terminals, or a loose connector at CN14 can interrupt power delivery or the FG feedback signal between the fan motor and the control board. Visually inspect the harness and connector for damage, corrosion, or poor seating.

  5. 05

    Foreign object obstructing the fan blade

    Wiring / connection

    Packaging material, food debris, or other items may have shifted into contact with the fan blade, mechanically restricting rotation. Check the fan compartment for any physical obstructions before proceeding with electrical diagnostics.

See the test procedure for each cause

Frequently asked questions about FG

What does FG mean on a Daewoo freezer?
The FG error code means the evaporator fan motor's speed feedback signal has dropped below 500 RPM. The control board monitors the fan using an FG frequency signal and automatically retries operation up to 10 times. If the fan does not recover after those retries, the board outputs the FG fault code. This error indicates the fan is not spinning at an acceptable speed and the freezer's air circulation is compromised.
Can I fix the FG error on my Daewoo freezer myself?
Some causes of the FG error are DIY-friendly, such as clearing ice buildup around the fan blade or removing a physical obstruction. However, diagnosing whether the fault lies with the fan motor, the wiring harness, or the main PCB requires a multimeter and the ability to measure DC voltage and frequency at connector CN14 on the control board. If the fan motor has failed, replacing it requires accessing the evaporator compartment, which is a moderate-difficulty repair.
Is it safe to keep using my freezer when the FG error is displayed?
It is not advisable to continue using the freezer with an active FG error. The evaporator fan is responsible for circulating cold air throughout the cabinet, and if it has stopped or slowed significantly, interior temperatures will rise. Food safety can be compromised relatively quickly, especially in a fully loaded freezer. The unit should be diagnosed and repaired promptly, and perishable food should be moved to an alternative freezer if the repair will take time.
How much does it cost to repair a Daewoo freezer FG error?
Repair costs depend on the root cause. If only the evaporator fan motor needs replacement, parts typically range from roughly 30 to 80 dollars depending on the model, plus labor if a technician is hired. If the main PCB is the cause, control board replacement can cost considerably more, often in the range of 100 to 250 dollars or higher for parts alone. Getting a diagnosis before committing to parts replacement is recommended.
Will resetting my Daewoo freezer clear the FG error code?
A power reset may temporarily clear the FG code and allow the freezer to restart, but the code will return if the underlying problem is not resolved. The control board already performed up to 10 automatic retries before latching the error, so a manual reset is unlikely to produce a lasting result if the fan motor is seized, obstructed, or receiving inadequate voltage. The root cause must be identified and corrected for the error to stay clear.

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