A gas oven igniter that glows orange but never lights the burner is one of the more misread faults out there. The glow fools people. On a Viking, and on most gas ranges that use a hot-surface igniter, the igniter has two jobs, and glowing is only half of one of them.
Bay Area Appliance Repair Service sees this call on Viking, plenty of GE and Samsung gas ranges, and the pro-style brands too. The physics is the same across all of them. Here’s what’s really going on.
The igniter is a switch, not just a glow stick
A hot-surface igniter heats up to light the gas, sure. But it also acts as the resistor that pulls current through the oven’s gas safety valve. That valve won’t open until the igniter draws enough amperage to warm its little bimetal strip. As an igniter ages, its resistance climbs, the current drops, and it still glows, just not hot enough or hard enough to trip the valve open. Glow, but no gas. No flame.
That’s the number-one cause of this exact symptom, by a wide margin.
The tell most people miss
A healthy Viking igniter glows bright orange-white and pulls roughly 3.2 to 3.6 amps once it’s up to temperature. A tired one glows a duller reddish-orange and drops below about 3.2 amps. The valve needs that current to open. You can’t judge amps with your eyes, which is exactly why “but it’s glowing” sends so many people down the wrong path.
When it’s actually the valve
If the igniter tests in spec and the burner still won’t light, the safety valve is next. The bimetal can stick shut, or open partway and hand you a weak, lazy flame instead of no flame at all. Valve failure is the second cause, more common on older ranges that have run hard. If someone already swapped the igniter and nothing changed, this is where to look.
How we pin it down
Clamp meter on the igniter circuit, run an oven cycle, read the actual draw. Under 3.2 amps at a steady glow, it’s the igniter, so we replace it. In spec but still no flame, we check the valve coils for continuity and resistance against Viking’s spec range. There’s a distant third suspect on some models, the control board driving the igniter circuit, but that usually shows up with other oddities like erratic cycling or display faults.
What’s worth checking before we come out
Confirm the oven has power and no breaker tripped. Make sure the gas shutoff behind the range is fully open. Light a surface burner: if the cooktop works and only the oven won’t, that points straight at the oven burner circuit. That’s about the extent of the useful homeowner checks.
Past that, this is a gas job. The repair means shutting off the gas, pulling the burner assembly, and leak-testing the connection afterward. A generic igniter can bring the exact same fault right back, because Viking’s valve wants a specific resistance profile. The safety valve is never a DIY part. Getting it wrong costs more than the visit would have.
Schedule a visit
If the oven lights sometimes but not reliably, hasn’t lit since it was installed, or you ever smell gas, stop using it and call. Same if a swapped igniter didn’t fix it.
We work on gas ranges across the Bay Area. The $75 diagnostic gets a clamp-meter reading and a straight answer on whether it’s the igniter or the valve, and it’s credited toward the repair. Book online or call (925) 999-4095.