BlueStar, Woodinville: the old igniter read 2.82 A, too weak to open the gas valve reliably
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Guide · Gas Ovens
Gas oven igniter: how to tell it’s bad, and how it’s tested
The most common reason a gas oven won’t heat, or is slow to light, is the igniter. The tricky part is that a failing igniter usually still glows. Here’s what’s going on, the signs to watch for, and how we confirm it.
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The short answer
On most gas ovens, the glowing igniter does two jobs: it lights the burner, and the current it draws is what opens the oven gas valve. As it wears out it can still glow bright orange while drawing too little current to open the valve, so the oven is slow to light, lights with a “whoomp,” smells of gas at start-up, or never lights. A clamp meter on the igniter circuit tells you for sure: on a BlueStar range we tested in Woodinville, a glowing igniter read only 2.8 amps, too weak to open the valve reliably.
How a glow igniter works
Most gas ovens and ranges use a hot-surface igniter, often called a glow bar: a small element under the oven floor, next to the bake burner, that glows orange when the oven calls for heat. It’s wired in line with the oven gas valve, and the valve only opens once enough current is flowing through the igniter. At that point the igniter is hot enough to light the gas straight away.
That’s why a worn igniter causes trouble long before it burns out completely. Its resistance creeps up, the current drops, and the valve opens late, or not at all, even though you can still see the glow.
Some ovens use a clicking spark igniter instead, like the burners on top of a gas range. This guide is about the glowing kind.
Signs of a weak oven igniter
- The oven takes longer and longer to light, or preheat slows down.
- The igniter glows, but the burner never lights.
- The burner lights with a loud “whoomp.”
- You smell gas for a moment when the oven starts. On the BlueStar in Woodinville, the owner smelled gas from the oven during bake. We leak-checked the oven gas valve and found no leak: the smell came from the delayed ignition.
- The oven lights sometimes and not others.
If you smell gas strongly, or the smell doesn’t go away, turn the appliance off, don’t operate light switches, leave the house and call your gas utility from outside.
It isn’t always the igniter
A slow oven can also be a burner problem. On an American Range in Seattle that took longer than usual to preheat and was noisy while it ran, the bake burner had corroded and burned through next to its flame ports. We replaced the burner and the igniter together. And if the igniter doesn’t glow at all, the cause can be the igniter itself, the wiring, or the control not calling for heat. That’s why it gets tested rather than guessed.
How we test an igniter
- Take off the oven floor (or the kick panel) to reach the bake burner, igniter and wiring.
- Turn the oven on and put a clamp meter on the igniter circuit while it glows.
- Compare the reading with the current that model’s gas valve needs to open. A reading below it means the igniter is too weak, however bright it looks.
- Inspect the bake burner for corrosion or burn-through while it’s exposed.
- After the repair, light the oven and check for a steady blue flame along the full length of the burner.
The current reading matters more than the glow. The old igniter on the BlueStar read 2.8 amps, not enough to open its valve reliably. It looked fine to the eye.
Why it’s not a good DIY job
- Igniters are brittle and crack easily if they’re touched or knocked during installation.
- The igniter is wired to the gas valve; a wrong part or a bad connection affects whether gas flows.
- The same symptoms can come from a burner, the wiring or the control, so a new igniter doesn’t always fix it.
We diagnose first, then give you a clear price before any repair begins. Our oven & range repair page covers the rest of what we work on, including high-end ranges from BlueStar, American Range, Wolf, Viking and Thermador.
Real photos
Real igniter and burner repairs
BlueStar, Woodinville: bake burner lit, with the glow igniter at the front
American Range, Seattle: a slow oven caused by a bake burner burned through
American Range, Seattle: bake burner and igniter under the oven floor
Questions
Gas oven igniter: FAQ
Do you replace gas oven igniters?
Yes. We test and replace bake igniters on gas ovens and ranges across King and Snohomish County, including high-end ranges from BlueStar, American Range, Wolf, Viking and Thermador. We’re an Authorized Service Provider for BlueStar and American Range.
How much does it cost to replace an oven igniter?
It depends on the range and on what actually failed. Sometimes the burner needs replacing too, as it did on an American Range in Seattle. We diagnose first and give a clear price before any repair begins.
Common gas oven igniter problems
Why does my oven igniter glow but the oven won’t light?
On most gas ovens the gas valve only opens once the igniter draws enough current. A worn igniter can glow and still draw too little, so the valve never opens. On a BlueStar in Woodinville, a glowing igniter read only 2.8 amps.
Can a weak igniter make my oven slow to preheat?
Yes. A weak igniter opens the gas valve late, so the burner lights late and the oven takes longer to heat. A corroded or burned-through bake burner can do the same, which is what we found on an American Range in Seattle.
Why does my gas oven smell like gas when it starts?
A weak igniter opens the valve late, so a little gas can build up before the burner lights. On a BlueStar in Woodinville we leak-checked the valve, found no leak, and replaced the igniter. If the smell is strong or doesn’t go away, turn the oven off, leave the house and call your gas utility from outside.
Oven slow to light, or not heating?
We’ll put a meter on it and tell you what failed.
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