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LG Oven / Range F3 error code

Oven / Range

LG oven / range error code F3 means: Oven thermistor error — temperature reading is out of range. This guide covers how to reset the code, the most common causes, step-by-step troubleshooting, and replacement parts that typically resolve F3.

Safe to keep using?

Stop using

No immediate safety hazard detected, but monitor during use.

  • • Unplug the appliance before inspection.
  • • Do not continue using the appliance until the cause is identified.

5 product recalls may apply

Brand-level matches — verify your model.

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DIY Difficulty
1 /10EASY

This is a straightforward homeowner task with basic tools and low risk.

Time: 15–30 minutes
Risk: Low
Skill: Beginner
Tools: Screwdriver, Adjustable pliers, Flashlight

Likely causes

Most likelyUser-serviceable issue

Many codes resolve with cleaning, resetting, or reconnecting.

Check: Power-cycle the appliance and check for obvious blockages or loose connections.

Est. cost: $0–$0

PossibleFailed component

Wear or electrical failure of an internal part.

Check: If basic checks fail, the faulty component likely needs replacement.

Est. cost: $0–$100

Repair or Replace?

DIY repair

$35–$65

Professional repair

$223–$302

Comparable replacement

$723–$977

Our recommendation

REPAIR LIKELY MAKES SENSE

REPAIR LIKELY MAKES SENSE. Professional repair ($223–$302) is well below replacement cost.

Actual repair and replacement costs vary by model, location, labor rate, and condition.

What it means

Oven thermistor error — temperature reading is out of range.

How to fix it

  1. Unplug the oven / range or turn off power at the breaker before inspecting any components.
  2. Reset LG F3: leave power off for 5 minutes, restore power, then restart. Confirm whether F3 returns.
  3. Check the most common cause for F3: Oven thermistor error — temperature reading is out of range.
  4. Inspect hoses, connections, and visible wiring for damage, clogs, or loose fittings.
  5. If a reset and basic checks don't clear the code, use our lookup tool for AI-powered diagnosis or contact a qualified technician.
  6. Reassemble, restore power, and run a test cycle. If F3 returns, the faulty component likely needs replacement.

Call a pro when: Call a technician if you smell burning, see sparking, hear grinding from the motor, or the code returns after replacing the suspected part.

Repair videos

LG Range Oven F3 Error Code (Meaning Behind The Error, What Causes It, And Best Solutions To Fix It)

LG Range Oven F3 Error Code (Meaning Behind The Error, What Causes It, And Best Solutions To Fix It)

[LG Ranges] Troubleshooting An F3 Error Code On An LG Range

[LG Ranges] Troubleshooting An F3 Error Code On An LG Range

LG Range LRE30755ST/02- F3 error code goes off when baking

LG Range LRE30755ST/02- F3 error code goes off when baking

User manuals
Start with the official support page, then use the search options if that link has moved. You’ll usually need your model number.
OfficialLG product manuals

Enter your model number to download LG manuals and docs.

Manual librarySearch LG Oven / Range manuals on ManualsLib

Free scanned manuals — search results, not a guaranteed match.

Web searchSearch the web for LG Oven / Range user manual

Useful when manufacturer pages move or don’t list older models.

FAQ

What does F3 error code mean on a LG oven / range?

Oven thermistor error — temperature reading is out of range.

What does LG F3 mean?

Oven thermistor error — temperature reading is out of range.

How do I reset LG oven / range F3?

Unplug the oven / range or switch it off at the breaker for 5 minutes, then restore power and restart. A reset clears a stored F3 after a glitch, but the code will return if the underlying fault is still present.

What part do I need for LG F3?

Not always — some F3 errors are caused by user-fixable issues like clogs or unbalanced loads. Try the troubleshooting steps first.

Can I fix LG error F3 myself?

Many F3 errors can be fixed DIY if you're comfortable with basic tools. Start with the reset and steps above. If the issue involves electrical components or the code returns after replacing parts, call a professional.

Do I need a replacement part for F3?

Not always — some F3 errors are caused by user-fixable issues like clogs or unbalanced loads. Try the troubleshooting steps first.

Other LG Oven / Range codes

LG F1LG F2LG F9LG F10LG F11

Prevent this problem next time

  • Follow manufacturer maintenance schedule
  • Address small issues before they worsen

Sources

Manufacturer meaning

Oven thermistor error — temperature reading is out of range.

FixApplianceCode guidance

Start with basic checks for LG F3 before ordering parts.

Source type: Part database

Source: ModelPartFinder + FixApplianceCode editorial

Last reviewed: 2026-08-24

Repair guidance is for informational purposes only. We do not guarantee that any fix will resolve your issue, and you assume all risk when following these steps. Terms & disclaimer

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