Kenmore Gas Oven Won’t Light: Systematic Diagnosis
A gas oven that will not light can be dangerous — unburned gas accumulates and creates an explosion risk. If you smell gas and the oven will not light after one or two attempts, stop trying, ventilate the kitchen, and call the gas company. For intermittent or slow ignition issues, this guide provides systematic diagnosis.
Safety First
If you detect a gas odor at any point during diagnosis, immediately turn off the oven, open windows, leave the house, and call your gas utility company from outside. Do not operate any electrical switches.
Cause 1: Igniter Is Dirty or Failed
The glow bar igniter is the most common cause of oven lighting failure. It must reach approximately 1,800°F to open the gas valve and ignite the flame. Food debris on the igniter insulates it, preventing it from reaching this temperature. Clean around the igniter with a dry brush or toothpick (oven must be cold and unplugged). If cleaning does not help, test the igniter current draw — a good igniter draws 3.2–3.6 amps. Below 3.2 amps indicates a weak igniter that must be replaced.
Cause 2: Gas Supply Issues
Verify the gas shutoff valve behind the range is fully open. Check whether the gas range’s surface burners light — if they do not, the issue is with the gas supply, not the oven igniter.
Cause 3: Gas Valve Failure
If the igniter glows but the oven does not ignite, the gas valve is not opening. This can be caused by a weak igniter (see above — valve requires minimum 3.2A to open) or a failed gas valve. Gas valve replacement requires professional service.
Cause 4: Loose Wire Connection
Vibration from normal oven use can loosen wire connections to the igniter or control board. Inspect all accessible connections to the oven igniter harness for looseness or corrosion.