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Error code reference

LG Range Error Code FD

Probe failure

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What the FD error code actually means

Your LG oven is detecting a problem with the meat probe, the temperature sensor you plug into the side of the oven to monitor food doneness. The probe or its cable has likely developed an electrical short, meaning the oven cannot read its temperature correctly. Until the probe is replaced or the issue is resolved, the oven may not operate properly with the probe function.

Diagnostic procedure

The full FD procedure

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MyPros+ · DiagnosticsStep 1 preview
1
First diagnostic step
Check meat probe resistance (56K ohms at room temperature at CN2 pins 1 to 2 with CN2 disconnected from board).
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Most common causes of FD

Ranked by how often they cause this code
  1. 1Damaged or shorted meat probe
  2. 2Damaged probe cable
  3. 3Contaminated probe connector or jack
  4. 4Corroded or damaged probe jack receptacle
  5. 5Faulty control board CN2 input circuit

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Questions people ask about FD

What does FD mean on a LG range?
The FD code on an LG range indicates a shorted meat probe. The control board monitors the resistance of the probe thermistor at the CN2 connector, and when that resistance is far below the expected 56K ohms at room temperature, it flags a short circuit fault. The probe, its cable, or the probe jack are the most likely sources of the problem.
Is it safe to use my LG oven while the FD code is showing?
You can generally use the oven for standard baking and broiling functions without the probe inserted, as the FD code specifically relates to the meat probe circuit. However, you should not attempt to use the probe-assisted cooking mode until the fault is resolved, as the oven will not be able to accurately monitor food temperature.
How much does it cost to fix the FD error code on an LG range?
If only the meat probe needs replacement, the part typically costs in the range of $20 to $60 depending on the model, making it one of the more affordable repairs. If the control board is at fault, board replacement can run anywhere from $150 to $350 or more for parts alone. A professional diagnostic service call will add labor costs on top of any parts needed.
Can I fix the FD error code myself?
In many cases, yes. Start by unplugging the probe and checking whether the error clears. If it does, measure the probe resistance with a multimeter at the CN2 connector pins to confirm whether the probe is shorted. A damaged probe is a straightforward part swap that most DIYers can handle without specialized tools.
Will resetting the oven clear the FD error code?
Resetting the oven by cutting power at the breaker may temporarily clear the display, but the FD code will return as soon as the control board detects the shorted probe circuit again. A reset does not fix the underlying fault. The probe, cable, or jack must be inspected and repaired or replaced to resolve the error permanently.

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