LG Igniter Replacement – How to Diagnose and Replace the Oven Igniter

Understanding the Problem

The oven igniter (glow bar) on LG gas ranges and ovens lights the gas when the oven calls for heat. A failing igniter is one of the most common causes of an oven not heating or taking a long time to light. Below are step-by-step diagnostics and repair instructions you can follow to replace an LG oven igniter. 1) Confirm the symptom: Preheat the oven and observe whether the igniter glows. If it doesn't glow, glows weakly, or glows but the burner never lights, the igniter is suspect. 2) Safety first: Turn the oven OFF, unplug it from power, and shut off the gas supply to the appliance before any inspection or disassembly. 3) Access the igniter: Open the oven and remove the racks. Remove the oven bottom panel (usually held by a few screws; some models have a front lip that pulls out first). The igniter is mounted near the burner tube at the back of the oven floor. 4) Visual inspection: Check the igniter for cracks, broken ceramic, burn marks, or a white powdery residue. Also inspect the two-terminal connector and wiring for heat damage or loose connections. 5) Electrical test (continuity/resistance): With the oven unplugged and igniter disconnected from wiring, use a multimeter set to ohms. Many oven glow igniters measure between about 20 - 400 ohms when good (values vary by model). An open circuit (infinite resistance) indicates a failed igniter. 6) Live-voltage check (advanced): If you’re experienced and comfortable with live electrical measurements, you can restore power, set oven to bake, and measure for 120 VAC at the igniter connector when the oven calls for heat. If 120 VAC is present but igniter doesn’t glow, replace it. If voltage is absent, the fault may be the control/thermostat/gas valve circuit. Use extreme caution with live voltage—if unsure, skip this step or call a pro. 7) Remove the old igniter: With power and gas off, disconnect the igniter wire harness (usually a 2-pin plug). Remove the mounting screws or nut holding the igniter bracket to the burner tube and carefully pull the igniter free. Avoid touching the ceramic/glass element with bare hands—oil from skin shortens life. 8) Install new igniter: Install the new igniter onto the burner bracket, secure with screws, and reconnect the 2-pin harness. Reinstall the oven bottom and racks. 9) Restore power and gas, then test: Turn gas and power back on, set oven to bake and confirm the new igniter glows strongly and the burner lights within 30–60 seconds. 10) Final checks: Confirm stable ignition across several cycles and no gas smell after shutdown. Safety note: Always shut off power and gas before disassembly. If you’re not comfortable working with gas or live voltage, hire a qualified technician. Never use the oven if you smell gas—ventilate and call your gas utility or a technician before attempting repairs.

Common Symptoms

Oven won’t light or heats very slowly; igniter doesn’t glow or glows weakly; oven takes a long time to reach temperature; gas smells when oven should be off.

Common Causes

• Worn or cracked igniter (glow bar) that no longer heats sufficiently to open the gas valve
• Damaged igniter wiring or connector causing intermittent or no power to the igniter
• Faulty oven control board or safety valve (less common) preventing proper power to the igniter

Popular Parts That Fix This Problem

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Frequently Asked Questions