LG Microwave Error Code F-6

Reviewed by the ApplianceErrors Editorial Team · Verified against manufacturer service documentation · Last verified: June 10, 2026

⚠ Medium Severity 🔧🔧 Moderate DIY

Keypad/touchpad failure

The most common cause of the F-6 error on a LG microwave is keypad membrane failure (~65% of cases); start with: clean and dry the touchpad.

💰 DIY cost: $40–$90 👨‍🔧 Pro cost: $150–$280 Save $110+ by doing it yourself

LG Microwave error code F-6 on the display panel — How the F-6 code appears on a LG microwave display

What Does Error Code F-6 Mean on a LG Microwave?

Keypad/touchpad failure.

F-6 fires when the control board's key-input scan detects an invalid or continuous signal from the touchpad matrix — typically a key reading as pressed when no one is touching it. The board interprets a stuck or shorted contact as a held button and locks out normal command entry. This distinguishes it from a dead display or relay fault: the panel usually still lights, but keys respond erratically or not at all. Membrane wear, grease, and steam bridging the contacts are the usual culprits.

Models affected: LG microwaves with membrane touchpad controls, including countertop, over-the-range, and built-in models

What owners report: Owners commonly report F-6 appearing after cooking steamy or greasy foods, or when a button feels sticky. A thorough cleaning and drying followed by a two-minute power cycle often clears it temporarily; recurring codes usually point to a worn membrane needing replacement.

What Causes Error Code F-6?

Here are the most common causes in order of frequency. Start with the most likely cause before moving to the next:

1

Keypad membrane failure 65% of cases
2

Food or moisture behind keypad 20% of cases
3

Loose keypad ribbon connector 10% of cases
4

Control board key input failure 5% of cases

How to Fix LG Microwave Error Code F-6

🔧🔧 Moderate DIY Est. time: 30–60 min

⚡ Safety first: Unplug the appliance before opening any panels or touching internal components.

1

Clean and dry the touchpad

Wipe the keypad with a barely-damp cloth, then dry it completely so moisture cannot bridge the membrane contacts.
2

Power cycle the microwave

Unplug for 2 minutes to reset the control board, then plug back in and test every key one at a time.
3

Replace the touchpad

If F-6 persists after cleaning and reset, replace the keypad/touchpad assembly for the exact model.

🔩 LG microwave touchpad ($40–$90)

How to Reset Error Code F-6

Unplug the microwave for 2 minutes after cleaning and drying the keypad, then restore power and test all buttons; if F-6 returns, the membrane has failed and the touchpad must be replaced.

Note: If the error returns after resetting, the underlying issue has not been resolved. Work through the fix steps above.

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When to Call a Professional

Call a technician if a new touchpad does not clear F-6, because the control board's key-input circuit is then suspect and opening a microwave cabinet exposes high-voltage capacitors that can remain dangerous.

Average professional repair cost for this issue: $150–$280

Same Code on Other Brands

Error code F-6 appears on these other brands too. See every brand that shows F-6 →

Haier Refrigerator F6

Communication error — control board fault

Amana Microwave F6

Microwave relay failure detected

Find Replacement Parts

Use these links to find the exact replacement parts for your LG Microwave:

🔩

Search PartSelect

LG Microwave repair parts

🔧

Search RepairClinic

Step-by-step video guides

External links — ApplianceErrors.com is not affiliated with these retailers.

More LG Microwave Error Codes

F-3 Temperature sensor error — over-temperature detected F-11 Shorted key on control panel

Frequently Asked Questions

Can I keep using my LG Microwave when error F-6 appears? +

You often can for a cycle or two, but the control-panel issue behind F-6 will keep interrupting normal operation until it is fixed. Plan the repair rather than ignoring the code.

What most commonly causes F-6 on a LG Microwave? +

Across reported LG microwave repairs, the most frequent is keypad membrane failure (65% of cases), food or moisture behind keypad (20%), then loose keypad ribbon connector (10%). Check them in that order before replacing any parts.

F-6 keeps coming back after a reset — what should I check next? +

A reset only clears the stored F-6 fault; if it returns, the control-panel problem is still present. Move on to the physical checks — clean and dry the touchpad, then power cycle the microwave — since the code will reappear until the root cause is resolved. This is a moderate job — a multimeter and some disassembly are usually involved.

How much does it cost to fix LG Microwave error F-6? +

A DIY repair typically runs $40–$90 in parts, versus $150–$280 for a professional service call, so handling it yourself saves around $110. Expect the work to take roughly 30–60 minutes.

Which LG Microwave models show error F-6? +

F-6 is documented on LG microwaves with membrane touchpad controls, including countertop, over-the-range, and built-in models. Other units sharing the same control platform can display it too, so the fixes here generally transfer across the series.

Sources & References

• LG Support — Help Library — official manufacturer documentation
• Our editorial & verification policy

Content verified against manufacturer service documentation. Last verified: June 10, 2026.

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