An igniter approaching the end of its life rarely goes from working to dead overnight. In most cases it moves through a recognisable progression over weeks or a couple of months, and learning the stages gives you the advance warning to plan a replacement on your own timeline.
This article is about the oven igniter on a gas oven — the glow bar that heats until it is hot enough to open the gas valve. It is a different part, with a different failure pattern, from the spark igniters at your surface burners, which are covered in how Wolf's ignition system works.
And it applies only to gas ovens. A dual fuel range has an electric oven with a bake element rather than an igniter, so if yours is dual fuel, that is the article you want.
Longer glow time before the gas valve opens is the earliest sign most owners notice. Preheat stretches out, though the oven still reaches temperature — it simply takes longer to get there than it did when the igniter was at full strength.
This is easy to attribute to something else, which is why it is worth knowing that a weakening igniter is one of the causes of a Wolf oven preheating slowly, alongside the door seal and the sensor.
As it weakens further, the igniter glows normally but needs several attempts before it succeeds in opening the valve. This stage is sometimes accompanied by a faint gas smell that clears once ignition finally catches — a healthy igniter opens the valve on the first attempt, every time.
That smell is worth taking seriously rather than accepting as normal, because gas is being released on each unsuccessful attempt. A brief odour at ignition is expected; one that recurs across repeated attempts is a symptom. See when a gas smell during preheat is normal and when it is not.
The final stage before complete failure is an igniter that glows steadily and looks entirely normal, but never generates enough heat to open the valve at all — leaving the oven cold while appearing to work.
This is the stage that catches people out, precisely because the visual check reassures. Glowing is not the same as working: the glow bar's job is to reach a temperature, and it can light up while falling short of it.
Replacing an igniter at the first or second stage is a straightforward and relatively inexpensive repair. Waiting for the third means discovering a cold oven at an inconvenient moment and arranging an urgent visit instead of a scheduled one.
There is a second argument, which is that every week spent at stage two is another few dozen occasions when gas enters the cavity before ignition succeeds.
The part itself is inexpensive and the job looks approachable, which is why it tempts people. Two things argue against it. The igniter sits in the burner assembly of a gas appliance, so the work involves the gas train rather than only the electrics. And glow bars are brittle — handling a new one carelessly, or contaminating it, shortens its life before it has run a single cycle.
One thing that is genuinely yours, though: stop repeatedly trying to light it. Each attempt at stage two or three sends gas into the cavity without ignition following, and doing it five times in a row while hoping is the version of this that goes wrong.
Visually, only partly — you can see whether it glows, but not whether it reaches the temperature the valve needs. That measurement takes a meter, which is why glowing-but-not-lighting is a technician's diagnosis rather than a kitchen one.
Years rather than months, and heavily dependent on use. What matters more than any figure is the trend: an oven taking noticeably longer to light than it did last year is telling you where it is in the progression.
For a short period while you arrange the repair, with the kitchen ventilated. It is not something to live with for months, both because of the gas and because stage three arrives without further warning.
That is stage one, or one of the other causes of slow preheating. Measure it rather than guessing — the distinction between an igniter, a seal and a sensor is worth establishing before ordering a part.
On many gas ovens the bake and broil burners have their own. Which function fails first is useful information, since it can narrow the fault to one igniter rather than a shared supply problem.
Taking several attempts to light, or glowing without ever catching? Both are the same part at different stages, and the first is the cheaper moment to act. We repair Wolf ovens and ranges throughout Arlington, Alexandria and the surrounding Northern Virginia communities, plus Washington, DC and Potomac, Maryland — book a diagnostic visit.
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