Why Is My Gas Oven Not Heating Up? Causes & Fixes

A gas oven that won't heat up is, more often than not, a worn bake igniter. It still glows, so it looks fine, but it no longer gets strong enough to tell the gas valve to open — so the oven sits there cold. Before you get to that, though, rule out the free stuff: no power to the range, a tripped breaker, a closed gas shutoff, or a setting like a delay-start or lock. Those take five minutes and fix a surprising number of "broken" ovens.

Here's the order we go through it on a real service call, from free checks to the parts that need a technician.

How a gas oven lights (and why it needs electricity)

Most gas ovens made in the last few decades don't use a standing pilot flame. Instead, when you set a bake temperature, the control sends power to a glow-bar igniter under the oven floor. The igniter heats up and, as it does, the current flowing through it rises. Once that current is high enough, the gas valve opens and the igniter lights the burner. On many ranges the igniter stays on the whole time the burner runs.

Two things follow from that. First, a gas oven with no electricity won't bake at all, even if the gas is fine. Second, the igniter and the valve work as a pair — if the igniter weakens, the valve never gets the signal to open, which is why a glowing igniter with no flame so often points to the igniter itself rather than the valve.

Why is my oven not heating: the free checks first

1. Power. Check that the range is plugged firmly into a working outlet — the plug can get nudged halfway out when the range is pushed back against the wall. Do the clock and the display light up?
2. Breaker or fuse. Look at your panel for a tripped breaker or a blown fuse on the kitchen circuit. Reset it once; if it trips again, stop and call a technician.
3. Gas supply. Do the cooktop burners light? If they don't either, the problem is the gas supply to the whole range, not the oven. Make sure the shutoff valve on the line behind the range is open (handle running along the pipe). In NYC buildings, also check whether the building's gas was recently shut off for work.
4. Recently installed or moved range. Many ranges have a small shutoff lever right on the pressure regulator at the back. If an installer left it closed, the igniter glows and nothing happens. If you're not sure where it is or which way is open, leave it for the technician.
5. Settings. Make sure the oven isn't in a delay-start, timer, Sabbath, or control-lock mode, and that you chose Bake rather than Broil (or the other way around).
6. The storage drawer. Pull the drawer under the oven and take out anything tall or stacked tight. If pans press hard against the drawer's ceiling, they can push it up and block the openings that feed air to the oven burner. The oven then lights slowly, burns poorly, or seems not to get hot.

If all of that checks out and the oven still stays cold, the cause is inside the range.

Why is my gas oven not heating up: the parts that actually fail

• Bake igniter. By far the most common one. Igniters weaken with age: they keep glowing but stop drawing enough current to open the valve. Signs: the igniter glows for a long time with no flame, the oven takes much longer to preheat than it used to, or it lights only some of the time.
• Broil igniter. Ovens with a separate broil burner up top have their own igniter. If baking works but broiling doesn't (or vice versa), the igniter for that burner is the first suspect.
• Gas valve. Less common. If the igniter is healthy and the gas is on but the valve still won't open, the valve or its wiring may have failed.
• Temperature sensor or control board. If the oven heats but never reaches the set temperature, or the display shows an error, the problem may be the sensor or the electronic control rather than the burner.
• Burner airflow and adjustment. A burner that lights slowly or burns with a lazy, yellow flame may not be getting the right mix of air and gas. Fixing that means adjusting parts of the gas train, which is technician work.

None of these are DIY repairs. Replacing an igniter or valve means opening the range and disconnecting gas lines, and a fitting that isn't sealed right afterwards is a gas leak. The $100diagnostic tells you exactly which part failed before you spend anything else, and it's credited in full if you go ahead.

Why is my oven not getting hot enough?

An oven that does heat, just slowly or not all the way, is a slightly different problem. The usual causes, in order: a tired igniter that takes too long to open the valve, a burner starved of air (check the storage drawer), a temperature sensor reading wrong, or strong drafts behind the range from unsealed gaps in the wall or floor. Also check that the oven door closes fully and the gasket isn't torn — a gap lets heat pour out. Our oven repair page covers temperature problems in more detail.

Safety: when to stop and call right away

• You smell gas. Turn the oven off, don't flip light switches or use anything that sparks, open windows, and leave. Call your gas utility or 911 from outside. Don't try to relight it.
• The igniter glows for minutes but nothing lights, and you smell gas when it finally does. Delayed ignition can light with a whoosh. Stop using the oven until it's checked.
• The breaker trips again after a reset. That's an electrical fault, not something to keep resetting.
• Yellow, sooty flames or a strong smell during baking. That points to a burner that isn't burning cleanly — have it adjusted.

What gas oven repair costs in NYC

Oven and range repair with us runs $300-$500 all-in — parts, labor and the $100diagnostic included, with the price approved before any work starts. An igniter replacement typically lands toward the lower end; a gas valve or control board toward the higher end. If the fix turns out to be something you could have done yourself, like an open gas shutoff, we'll tell you.

When to call a pro

• Power, breaker, gas, settings, and the drawer all check out and the oven is still cold
• The igniter glows but the burner doesn't light, or lights only after a long delay
• Bake works but broil doesn't, or the other way around
• The oven heats but never reaches the temperature you set
• You smell gas at any point

Same-day service across Manhattan below 110th Street, Brooklyn, and Queens. Approve the repair and the visit costs you nothing — the $100 flat diagnostic is credited in full. 90-day parts-and-labor warranty. If it's the cooktop burners that won't light, see gas stove repair.

Frequently asked questions