When only some burners on a gas stove ignite while others fail to catch a flame, the issue is typically localized to the non-working burners rather than a total gas supply failure. Common culprits include clogged burner port holes blocked with food grease, misaligned burner caps, or grease film insulating individual ceramic spark electrodes. When debris covers the ports, gas cannot reach the spark. You can troubleshoot ignition faults safely. You can verify that your corrective action is successful when scrubbing the non-working burner heads with a wire brush, clearing out port holes with a pin, and seating the burner caps flush allows all burners to light uniformly.
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