Gas Oven Not Igniting? Here's How to Fix It

A gas oven that won't ignite --- where you hear clicking but see no flame, or the oven simply stays cold --- is a frustrating but usually diagnosable problem. Most gas oven ignition failures come down to a few specific components. Here's how to work through them safely.

Safety First

Before doing any inspection of a gas oven: turn the oven off completely, ensure no gas smell is present (if you smell gas, leave the home and call your gas utility immediately), and allow the oven to cool fully before touching anything inside. Never attempt to bypass the ignition system or manually light a modern gas oven's baking burner --- these ovens are not designed for match lighting.

Step 1: Watch the Igniter

Set the oven to Bake at 350°F and watch through the oven window or the bottom panel opening. Within 30--60 seconds, you should see the igniter begin to glow orange, followed by the gas igniting into a blue flame.

• Igniter doesn't glow at all: power issue, failed igniter, or wiring problem
• Igniter glows dim orange but no flame after 90+ seconds: igniter is weak --- the most common cause
• Igniter glows bright but no flame: gas supply issue or safety valve failure
• Igniter glows and flame lights, but flame goes out quickly: flame sensor or burner issue

The Weak Igniter Problem

This is by far the most common cause of a gas oven not lighting. The igniter must reach a specific current draw (typically 3.2--3.6 amps) to open the gas safety valve. As igniters age --- typically after 5--7 years of regular use --- they lose the ability to draw sufficient current. They still glow, but not hot or bright enough to trigger the valve.

A weak igniter looks like it's working because it's glowing, but nothing happens. If the igniter takes more than 90 seconds to light the oven --- or never does --- replacement is almost certainly the fix. Igniter replacement is a moderately straightforward repair for a technician and typically costs $150--$250 all-in.

Checking the Igniter Yourself

With the oven off and unplugged, remove the oven bottom panel (usually two screws). The igniter is connected to the burner tube. Visually inspect it for cracks or breaks --- a cracked igniter body is a definitive failure. If it looks intact, a technician can test the current draw with a clamp meter while the oven is running.

Gas Supply and Valve Issues

If the igniter tests good (glows bright, draws correct current) but still no flame:

• Check the gas shutoff valve --- fully open means handle parallel to the pipe
• Test other gas appliances --- if stovetop burners work, gas supply to the range is fine
• The gas safety valve may have failed --- this requires professional replacement

Burner Ports Clogged

On some gas ovens, grease and food debris can clog the small ports along the burner tube, causing uneven ignition or a flame that won't sustain. Remove the oven bottom and inspect the burner. Use a soft brush or a thin wire to clear any visible clogs from the ports. Never drill out ports --- they are precision-sized for correct gas flow.

Igniter Works but Oven Shuts Off

If the oven lights normally but the flame goes out after a few minutes, the flame sensor (also called the thermocouple or flame rod on some models) may be failing. It detects that the burner is lit and keeps the gas valve open --- if it can't detect flame, it shuts the gas off as a safety measure.