Lg Oven Error F18

⚡ Quick Answer: The LG oven error code F18 indicates a malfunction with the lower oven temperature probe, which may be shorted or not detected. This can lead to the o... ✅ DIY Fixable

What Does Error F18 Mean?

The LG oven error code F18 indicates a malfunction with the lower oven temperature probe, which may be shorted or not detected. This can lead to the oven failing to heat properly or displaying inconsistent temperatures. If you see the F18 error on your oven panel, it is essential to check the temperature probe and its wiring for faults or disconnections, as these are common causes of the issue.

Common Symptoms:

  • Error F18 displayed on oven panel
  • Oven fails to heat properly or start cooking cycle
  • Temperature probe reading out of range or not detected

Possible Causes

  • Lower oven temperature probe is shorted or faulty (medium)
  • Wiring issue between the probe and control board (medium)
  • Control board fault affecting probe circuit (low)

How to Fix Error F18

DIY Fix Power Reset and Basic Check

  1. Turn off and unplug the oven from the power source.
  2. Wait 5–10 minutes, then plug the oven back in and power on to see if F18 clears.
  3. Ensure the oven’s probe (if removable) is fully connected correctly.

Technician Only Inspect and Replace Probe and Wiring

  1. Disconnect oven power.
  2. Access the oven’s internal temperature probe wiring harness.
  3. Visually inspect wiring for damage, shorts, or loose connectors.
  4. Test the probe resistance with a multimeter (compare to expected values per model).
  5. Replace the probe and/or repair wiring if readings are outside specification.
  6. Verify control board connections and test for continuity.

Parts needed: Lower oven temperature probe, Wiring harness/connectors

🛑 When to Call a Pro:
  • If the F18 error persists after probe and wiring inspection
  • If user is uncomfortable opening appliance panels or lacks proper tools
  • If there are signs of electrical damage or burning smell

Technical Specifications

wattage 3000W
component Heating Element
resistance 10-30 ohms
part_number LG EBF49827801
voltage_rating 240V AC

Common Questions

What does F18 error mean on LG oven?

The F18 error indicates a malfunction in the lower oven temperature probe, causing heating issues.

Can I fix LG oven F18 error myself?

Yes, you can perform a power reset and check the temperature probe connection to troubleshoot the issue.

How much does it cost to fix F18 error?

Repair costs for the F18 error range from ¥5,000 to ¥25,000 for parts, excluding labor.

When should I call a technician for F18?

Call a technician if the F18 error persists after checking the probe or if you notice electrical damage.

Data last verified: 2026-01-11

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