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Appliance Error Codes

What Does F9 Error Mean on LG LSGL6335F?

Error F9 on LG LSGL6335F: No heating detected — oven temperature did not exceed 150°F within 5 minutes of . Follow the troubleshooting steps below to diagnose and fix this range issue. The F9 error code on your LG LSGL6335F range means the oven failed to reach 150°F within 5 minutes of the start of a preheat cycle. Press CLEAR/OFF and trip the circuit breaker for 30 seconds as a first step. If F9 returns, on electric models the bake element has likely failed; on gas models check that the gas supply valve behind the range is fully open and the igniter is functioning. ## What Does F9 Mean? F9 indicates the LSGL6335F oven could not produce any meaningful heat in the expected time after the heating elements or gas igniter were commanded on. The control board monitors the temperature sensor during preheat — if the oven cavity does not rise above 150°F within 5 minutes, F9 is logged. On the electric LRE3061ST, the most common cause of F9 is a burned-out bake element (the heating element at the bottom of the oven cavity). The bake element can develop visible cracks, blisters, or burn-through points. On gas models like the LRG3061ST and LSGL6335F, F9 is most commonly caused by a failed igniter that glows but does not draw enough current to open the gas valve. A tripped circuit breaker on a double-circuit range (where the clock/controls and heating elements are on separate legs) can also cause F9 if one leg is missing. ## Possible Causes 1. On electric models: burned-out or broken bake element — the most common cause of F9 2. On gas models: failed oven igniter that glows but does not draw sufficient current to open the gas valve safety valve 3. On gas models: gas supply shutoff valve behind the range is partially or fully closed 4. A failed oven temperature sensor reading no temperature rise even when the element is working 5. Electrical supply issue — one leg of the 240V supply missing on electric models ## Troubleshooting Steps | Step | Action | Expected Result | |------|--------|-----------------| | 1 | Press CLEAR/OFF and trip the circuit breaker for 30 seconds; restore power and attempt another preheat cycle | F9 does not return after reset — transient fault | | 2 | On electric models: with power disconnected, open the oven and visually inspect the bake element at the bottom of the oven cavity for cracks, holes, burned spots, or blistering; a damaged element must be replaced | Bake element is inspected — damage visible or not | | 3 | On gas models: check that the gas shutoff valve immediately behind the range is in the fully open position (parallel to the gas pipe); a partially closed valve reduces gas pressure and prevents ignition | Gas valve is confirmed fully open | | 4 | On gas models: observe the oven igniter during a preheat attempt — it should glow orange-yellow within 30 to 60 seconds and become progressively brighter until the gas valve opens and ignition occurs; if the igniter glows only dimly or fails to glow, it must be replaced | Igniter glow intensity is assessed | | 5 | On electric models: with the oven disconnected from power, test the bake element resistance with a multimeter — a working element shows some resistance (typically 15 to 30 ohms); OL confirms an open bake element requiring replacement | Bake element resistance confirms working or failed | | 6 | Replace the failed component and restore power; run a preheat cycle to confirm the oven heats and F9 does not return | Oven preheats successfully and F9 does not return | On gas models, never attempt to manually ignite the gas oven flame. If the igniter fails to light the gas automatically, turn off the gas supply and ventilate the kitchen before performing any diagnosis or repair. Do not allow gas to accumulate. ## When to Call a Technician Contact LG authorized service if: - On gas models: the gas igniter replacement did not resolve F9 — the gas valve safety valve may have failed and requires professional replacement

  • On electric models: bake element and sensor replacements did not resolve F9 — the control board heating relay has failed
  • F9 on a gas model combined with a gas smell indicates a gas supply or valve issue requiring an immediate professional evaluation Professional repair costs for F9 issues typically range from $100 to $350 depending on the specific component and your service region. ## Frequently Asked Questions ### How do I know if the bake element has failed on my LG LRE3061ST? Disconnect power and visually inspect the bake element at the bottom of the oven cavity. Look for any visible crack, blister, burn hole, or dark spot along the element’s surface. A healthy element has a uniform metallic appearance. Even a small crack or burn mark confirms failure. If no visible damage is present, test the element resistance with a multimeter — an OL (open circuit) reading with no visible damage also confirms the element has failed internally.

Can I use the broiler while F9 is active? If F9 is caused by a failed bake element and the broil element is still functional, the broil function may work temporarily. However, LG recommends resolving F9 before using any oven function, as operating with a missing bake element changes thermal distribution inside the oven and may produce uneven heating or cause the control board to log additional errors.

Section titled “Can I use the broiler while F9 is active? If F9 is caused by a failed bake element and the broil element is still functional, the broil function may work temporarily. However, LG recommends resolving F9 before using any oven function, as operating with a missing bake element changes thermal distribution inside the oven and may produce uneven heating or cause the control board to log additional errors.”

My LG LRG3061ST gas range igniter glows orange but the oven does not light — is that F9? Yes. A gas oven igniter that glows but does not open the gas valve is a classic igniter failure. The igniter must draw approximately 3.2 to 3.6 amps to open the bimetal safety valve. When the igniter ages, its resistance increases, current draw drops below the valve’s threshold, and the gas valve stays closed. The igniter glows visibly but the oven never lights, eventually triggering F9.

Section titled “My LG LRG3061ST gas range igniter glows orange but the oven does not light — is that F9? Yes. A gas oven igniter that glows but does not open the gas valve is a classic igniter failure. The igniter must draw approximately 3.2 to 3.6 amps to open the bimetal safety valve. When the igniter ages, its resistance increases, current draw drops below the valve’s threshold, and the gas valve stays closed. The igniter glows visibly but the oven never lights, eventually triggering F9.”

Does F9 affect the cooktop burners on my LG range? No. The cooktop burners and the oven are on separate circuits. F9 is specific to the oven heating system. On gas models, the cooktop burners use a separate ignition system independent of the oven igniter. On electric models, the cooktop radiant elements have their own wiring circuit. Cooktop burners should continue operating normally while F9 is active. Reference: LG official support documentation (lg.com/us/support) and authorized service guides ### Is it safe to keep using my LG LSGL6335F with error F9? If error F9 does not indicate an immediate safety hazard such as a gas leak, electrical short, or water flooding, you can continue limited use while monitoring the appliance. However, running the range with an active error code increases the risk of further damage. Address the underlying issue as soon as possible. For high-severity errors, disconnect the appliance and contact a qualified technician. ### How much does it cost to fix error F9 on a LG LSGL6335F? Repair costs for error F9 on the LG LSGL6335F range depend on the root cause. DIY fixes such as cleaning filters, resetting the unit, or reconnecting loose wires cost nothing beyond basic tools. If a component replacement is needed, parts and labor from a certified technician are the main expenses. Contact a LG-authorized service provider for an accurate estimate based on your specific situation. ### What does error code F9 mean on a LG range? Error code F9 on LG range models indicates No heating detected — oven temperature did not exceed 150°F within 5 minutes of starting a preheat c. This error is detected by the appliance’s internal diagnostic system and displayed to alert the user that attention is needed. Refer to the troubleshooting steps above for guidance on resolving this issue.

Section titled “Does F9 affect the cooktop burners on my LG range? No. The cooktop burners and the oven are on separate circuits. F9 is specific to the oven heating system. On gas models, the cooktop burners use a separate ignition system independent of the oven igniter. On electric models, the cooktop radiant elements have their own wiring circuit. Cooktop burners should continue operating normally while F9 is active. Reference: LG official support documentation (lg.com/us/support) and authorized service guides ### Is it safe to keep using my LG LSGL6335F with error F9? If error F9 does not indicate an immediate safety hazard such as a gas leak, electrical short, or water flooding, you can continue limited use while monitoring the appliance. However, running the range with an active error code increases the risk of further damage. Address the underlying issue as soon as possible. For high-severity errors, disconnect the appliance and contact a qualified technician. ### How much does it cost to fix error F9 on a LG LSGL6335F? Repair costs for error F9 on the LG LSGL6335F range depend on the root cause. DIY fixes such as cleaning filters, resetting the unit, or reconnecting loose wires cost nothing beyond basic tools. If a component replacement is needed, parts and labor from a certified technician are the main expenses. Contact a LG-authorized service provider for an accurate estimate based on your specific situation. ### What does error code F9 mean on a LG range? Error code F9 on LG range models indicates No heating detected — oven temperature did not exceed 150°F within 5 minutes of starting a preheat c. This error is detected by the appliance’s internal diagnostic system and displayed to alert the user that attention is needed. Refer to the troubleshooting steps above for guidance on resolving this issue.”