When a gas oven won’t heat, the usual culprit is a weak igniter; also check gas supply, power, and settings.
If your dinner plans are stuck because the bake cavity stays cold, you’re in the right place. This guide walks you through smart checks, common parts that fail, and safe next steps. The goal: confirm the problem early, avoid guesswork, and decide whether it’s a quick DIY or a job for a pro.
Gas Oven Not Heating — Common Causes And Quick Checks
Most no-heat cases trace back to just a few parts or setup issues. Start with basics, then move to targeted tests. Use the symptom table below to narrow things fast.
| Symptom | Likely Cause | Quick Check |
|---|---|---|
| Oven stays cold on Bake | Weak or failed bake igniter | Igniter glows but never lights burner; glow is dim or takes 90+ sec |
| Broil works, Bake does not | Bake igniter only | Try Broil; if Broil heats, focus on Bake igniter circuit |
| No flame, no glow | No power to igniter, bad control, open fuse | Confirm outlet power; check house breaker; look for blown range fuse |
| Clicks but no light | Spark system issue or no gas flow | Listen for repeated clicks; verify gas shutoff valve is open |
| Heats but never reaches set temp | Weak igniter, sensor out of range, poor calibration | Oven stalls below target; verify sensor resistance and run a preheat test |
| Flame lights then dies | Flame sensing or safety valve issue | Watch flame; if it cuts out fast, suspect sensor/valve path |
| Everything cold: top burners too | Main gas supply off or empty cylinder (LP) | Check building gas, tank gauge, and shutoff position |
| Display on, but no heat anywhere | Child lock, wrong mode, delayed start, or control fault | Look for “Loc” or timer icons; try a power reset |
| Strong gas smell | Unlit gas flow, leak, or venting problem | Stop, ventilate, shut gas off, and call a licensed technician |
| New install won’t heat | Regulator set to wrong fuel (NG vs LP) | Check model fuel type; regulator must match supply |
Safety First Before Any Test
Gas plus ignition demands care. If you smell raw gas, stop. Open windows, turn the supply valve off, and contact a licensed technician. Fit a CO alarm in the kitchen area and keep vents clear. Annual appliance checks help prevent CO risk; the Gas Safe Register guidance outlines why a yearly inspection matters.
Fast Basics That Solve Many No-Heat Calls
Confirm Power And Settings
Ranges need electricity for the control board, igniter, and fans. Make sure the plug is seated and the breaker is on. Clear any delay-start settings. Pick the right mode (Bake, not Warm). If the display shows a lock icon, disable control lock in the manual.
Check The Gas Supply
Verify the shutoff valve behind the range is parallel to the pipe (open). If you use LP, confirm the tank level and any second regulator near the house. If top burners light but the oven doesn’t, the supply is present; focus on the oven circuit.
Run One Clean Preheat Test
Set Bake to 400°F and start a timer. Peek through the view holes in the oven floor. In many models, the igniter should glow and the burner should light within about 60 seconds. If it glows with no flame, it’s usually too weak to open the safety valve.
Igniter: The Most Common Failure
On glow-bar systems, the igniter must draw enough current to open the gas valve. A tired part can still glow but never gets hot enough. That’s why owners see the orange glow and assume gas is the problem, when the fix is the igniter.
How To Spot A Weak Igniter
- Glows dull orange and sits there for a minute or more.
- Burner lights only after a long delay, then cycles off too soon.
- Broil works fine while Bake fails.
DIY Level: Moderate With Care
Most igniters mount with two screws and a plug or wire nuts. Kill power and close the gas valve before touching anything. Don’t handle the ceramic with bare, oily hands. Match the part by model number; length and connector style matter.
Brands describe this pattern in their own guides. See the GE service note on ovens not heating, which points to the ignitor path as a leading cause. Their page walks through mode checks and burner lighting cues: GE “Oven Not Heating”. Whirlpool’s support article outlines similar steps and when to call in a technician: Whirlpool gas oven tips.
Sensor, Thermostat, And Control Paths
If the burner lights but the temperature stalls low, move beyond the igniter. Two parts set and sense temperature: the oven sensor (RTD probe) and the thermostat or electronic control. When either drifts, the oven may cycle off early.
Oven Sensor (RTD Probe)
The probe typically sits on the back wall inside the cavity. It reports heat to the control. When it reads wrong, the board makes bad decisions. Many sensors measure near 1080Ω at room temp, rising with heat. A meter test (with power off and leads isolated) can confirm drift. Replace the probe if readings are far off spec for your model.
Mechanical Thermostat (Older Models)
Older ranges use a capillary bulb and a dial. Broken capillary lines or worn contacts kill heat. A thermostat swap is a bolt-in repair on many models, yet panel access varies, so take photos as you go.
Electronic Control Board
When relays fail, you might hear clicks with no burner light, or no clicks at all. Inspect for scorched spots or loose harness plugs. If top burners work and the igniter never gets power in Bake, the board or a high-limit device may be open.
Fuel Type And Regulator Setup
New installs can run cold if the appliance ships for natural gas but the home uses LP, or if the regulator is set to the wrong fuel. Look for a cap on the regulator that flips for NG vs LP. Orifices also differ; many conversion kits include tiny brass jets and a sticker for the rear panel. If the last service converted the cooktop but not the oven, flames may be weak or non-existent in Bake.
Airflow, Venting, And Flame Quality
A healthy flame is steady and mostly blue with small yellow tips. Soot on cookware points to poor mix or the wrong orifice. Dust in the burner tube, foil blocking vents, or a misaligned flame spreader can choke the mix. Clean the burner ports with a soft brush and compressed air. Keep the oven floor plate seated and flat after service so the flame spreads correctly.
Step-By-Step Troubleshooting Plan
1) Verify Power, Mode, And Timers
Confirm a live outlet, correct Bake mode, and no delayed start. Try a full power reset: unplug for one minute and re-test.
2) Confirm Gas Flow
Make sure the shutoff valve is open. If you use LP, read the tank gauge and check the second-stage regulator outside. If all surface burners light strong, gas supply is present.
3) Watch The Ignition Sequence
Start Bake and watch through the view holes. Note glow time, ignition, and whether the flame holds. If it glows with no flame, plan on a new igniter. If there’s no glow and no click, chase power to the igniter.
4) Test The Sensor
Disconnect power, remove the back panel, and meter the sensor at room temp. Compare to spec for your model. Replace if it’s far off.
5) Check For Locked-Out Controls Or Error Codes
Some ranges store faults that block heat. Clear codes per the manual. If errors return, the board or a safety device may be open.
6) Inspect Wiring And Grounds
Look for brittle wires near the burner, loose spade connectors, or melted plugs. Tug each connector lightly; reseat if loose.
When It’s A Straightforward DIY
Swapping a glow-bar igniter is a common homeowner repair. Use the exact part number or a listed replacement. Keep the ceramic body clean, route wires away from direct flame, and avoid overtightening the mounting screws. If the burner lights strong after the swap and the oven reaches set temp, you’re done.
When To Call A Licensed Technician
Call in help when flames roll out, raw gas smell lingers, wiring looks burned, the regulator needs a fuel conversion, or you’re unsure about meter tests. A specialist can measure igniter current draw, verify gas pressure, and update any control firmware if your model supports it.
DIY Or Pro — Make The Right Call
| Issue | Safe DIY? | Call A Pro If… |
|---|---|---|
| Glow-bar igniter weak or open | Yes, with power and gas off | Wiring is brittle, connectors scorched, or part doesn’t match |
| Oven sensor (RTD) out of range | Yes, meter test and swap | Readings swing wildly; control also shows faults |
| Mechanical thermostat faulty | Maybe, if panel access is clear | Capillary line buried or control layout is complex |
| Electronic control/relay failure | No, in most cases | Relays chatter, no output to igniter, or board shows burn marks |
| Fuel conversion (NG ↔ LP) | No | Regulator, orifices, and pressure must be set and tested |
| Persistent gas smell or soot | No | Stop, ventilate, shut gas, and book service |
Smart Tips To Get Heat Back Faster
- Pull the model/serial tag before shopping parts; it’s often on the door frame.
- Take photos during disassembly; they help with wire routing.
- Clean burner ports with a soft brush; keep foil away from vents.
- Use the right meter leads and a known-good multimeter battery for sensor tests.
- After repair, run a 450°F preheat and a loaf-pan water test to verify boil within a fair time window.
Calibration And Real-World Expectations
Home ovens swing around the set point by design. A ±15–25°F swing is common during cycling. If bakes brown unevenly, confirm rack placement and pan color. Dark pans absorb heat fast; shiny pans lag. If a recipe wants steady heat, give the oven a full 15 minutes after the beep so the walls and racks soak up energy, then load your tray.
Upkeep That Prevents The Next No-Heat Surprise
- Vacuum crumbs under the oven floor plate and around the burner twice a year.
- Keep the cooling fan inlets clear; dust can slow airflow near controls.
- Schedule a yearly safety check. CO alarms save lives; read the CPSC CO sensor overview and fit a tested alarm near the kitchen.
- If your home uses LP, keep an eye on tank level during holiday cooking days.
Checklist: From Cold Oven To Working Bake
- Power on, correct mode, no child lock, no delayed start.
- Gas valve open; burners on the cooktop light strong.
- Start Bake and watch: glow, flame, and stable burn.
- No flame with glow → plan an igniter swap.
- Flame lights then dies → check sensor and valve path.
- Stalls low on temp → test sensor and consider calibration.
- New install or fuel switch → verify regulator/orifices match supply.
Wrapping Up With Confidence
Most cold-cavity headaches trace to a tired igniter or a simple setup issue. With the checks above, you can isolate the problem, fix a common part safely, or hand off the right details to a technician. Either way, you get back to steady heat and consistent bakes without guesswork.