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Error code reference

LG Range Error Code F17

Lower oven convection fan motor open

LG codesLG range codes

Lower oven convection fan motor open — convection fan does not operate for 1 minute cumulative time during convection fan operation period.

First step from the service manual

Check wiring, then check motor resistance.

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

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  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
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What F17 means on a LG range

The F17 error code on an LG range indicates an open circuit condition in the lower oven convection fan motor. Specifically, the control board detects that the convection fan has failed to operate for a cumulative total of one minute during a period when the fan is expected to be running. This is not a momentary blip but a sustained failure that the board tracks over time, making it a reliable indicator that something is genuinely wrong with the fan motor circuit or the motor itself.

The convection fan motor in the lower oven circulates hot air throughout the oven cavity during convection cooking modes. When the motor fails to spin, heat distribution becomes uneven and the oven cannot maintain accurate temperatures. The term "open" in this context refers to an open electrical circuit, meaning the current path through the motor windings is broken. This can occur at the motor windings themselves, at a connector, or anywhere along the wiring harness between the control board and the motor.

Diagnosis should begin with a visual and physical inspection of the wiring harness running to the convection fan motor, checking for burnt, pinched, or disconnected wires and loose connector pins. If the wiring appears intact, the next step is to measure the resistance across the motor windings using a multimeter. An open reading, typically displayed as infinite resistance or OL on a meter, confirms the motor windings have failed and the motor requires replacement. A reading within a normal resistance range shifts suspicion back toward the control board or the wiring path.

Source: manufacturer service documentation.

Common causes of F17

  1. 01

    Failed convection fan motor

    Part replacement

    The motor windings can burn out or break internally, creating an open circuit that the control board detects as a fan failure. Measuring resistance across the motor terminals will show infinite resistance if the windings have failed.

  2. 02

    Damaged or disconnected wiring harness

    Wiring / connection

    The wiring between the control board and the fan motor can become burnt, pinched, or pulled loose from a connector, interrupting the circuit. A visual inspection of the harness and connector pins is the first step to rule this out.

  3. 03

    Loose or corroded connector

    Wiring / connection

    Connector pins at the motor or at the control board can corrode or work loose over time due to heat cycling, causing an intermittent or permanent open circuit. Reseating and inspecting the connector for corrosion can resolve this without replacing parts.

  4. 04

    Fan blade obstruction or seized motor

    Wiring / connection

    Debris or grease buildup can prevent the fan blade from spinning freely, which can cause the motor to overheat and eventually fail. Checking that the fan blade turns freely by hand can help identify a mechanical blockage.

  5. 05

    Faulty control board

    Part replacement

    If the wiring and motor resistance both test normal, the control board may not be sending power to the motor correctly. This is the least likely cause and should only be considered after the motor and wiring have been confirmed good.

See the test procedure for each cause

Frequently asked questions about F17

What does F17 mean on a LG range?
The F17 code on an LG range indicates that the lower oven convection fan motor has an open circuit condition and failed to run for a cumulative one minute during a convection operation cycle. The control board monitors fan activity and triggers this code when the fan is not responding as expected. It points to a problem with the fan motor itself, the wiring leading to it, or a connector in the circuit.
Can I fix the F17 error myself?
A knowledgeable DIYer can handle some of the diagnostic steps, such as inspecting the wiring harness, reseating connectors, and using a multimeter to check motor resistance. If the motor tests open, replacing the convection fan motor is a moderately involved repair that requires pulling the oven and accessing the rear or bottom panel. If you are not comfortable working around appliance wiring, a qualified technician is the safer choice.
Is it safe to use my LG range while the F17 code is showing?
Using standard bake or broil functions may still be possible since those do not rely on the convection fan, but convection cooking modes will not perform correctly without a working fan. Continuing to attempt convection cooking with a failed motor is not advisable, as it can lead to uneven cooking and may stress other components. Addressing the fault before regular heavy use is recommended.
How much does it cost to repair an F17 error on an LG range?
If the repair requires a new convection fan motor, parts typically run in the range of $40 to $120 depending on the specific model. Adding professional labor, the total repair cost often falls between $150 and $350. If only a wiring repair or connector replacement is needed, costs can be considerably lower.
Will resetting the range clear the F17 error code?
Resetting the range by cutting power at the breaker or unplugging it may temporarily clear the F17 code, but the error will return as soon as the oven attempts to run the convection fan again and detects the same open circuit condition. A reset does not fix the underlying problem. The motor, wiring, and connectors need to be inspected and tested to resolve the fault permanently.

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