An oven that won't heat is frustrating mid-recipe, but the good news is that the cause is almost always one specific component rather than a general failure. Electric and gas ovens fail differently, so it's worth confirming which type of problem you're dealing with before troubleshooting further.
Try the broil test first
Switch the oven to broil mode. If the broil element heats normally but bake mode doesn't, you've immediately narrowed the problem down to the bake element circuit (electric) or the lower burner circuit (gas) rather than a general power issue. This one test saves a lot of diagnostic time.
Electric ovens: the most common causes
1A burned-out bake element
This is the coiled rod visible at the bottom of the oven cavity. Look for visible blistering, cracks, or a spot where it's actually burned through — physical damage like this usually means the element has failed. If the broil element (top of the cavity) glows normally but the bake element doesn't, this confirms the diagnosis.
2A blown thermal fuse
This safety device cuts power to the heating elements if the oven overheats. Once blown, it doesn't reset on its own and needs replacement. It's a genuinely straightforward, affordable repair once identified.
3A failed temperature sensor or thermostat
The sensor probe, usually mounted near the top-back wall of the oven cavity, tells the control board what temperature the oven has actually reached. If it's giving a bad reading, the oven may never register that it's cold and simply won't turn the elements back on.
Gas ovens: the most common causes
1A weak igniter
This is the single most common cause of gas ovens not heating. The igniter has to draw enough electrical current to get hot enough to open the safety gas valve — if it's weakened with age, it may glow but never get hot enough to actually open the valve. Watch it during a heat cycle: it should glow bright orange within about 60 seconds and the burner should light. If it glows weakly for several minutes without the burner ever lighting, the igniter needs replacement.
2A failed safety valve
The valve only opens when the igniter draws sufficient current. If the valve itself has failed internally, gas won't flow even with a perfectly good igniter. This is worth flagging: always test and rule out the igniter first, since replacing a good valve when a weak igniter was the actual problem is a common misdiagnosis that wastes money.
3Gas supply issues
Turn on a stovetop burner. If it lights normally, gas supply to the appliance is fine and the problem is isolated to the oven section specifically. If the stovetop also won't light, the issue is upstream of the oven itself.
Diagnosed it, but not sure about the fix?
Our technicians carry bake elements, igniters, sensors, and thermal fuses for all major brands and typically resolve oven heating issues in a single visit.
Call (814) 246-1412Quick checks before you assume the worst
- Check the clock or timer. Some ovens won't heat if set to delay start, or if the display is flashing after a power outage — cancel any timer and reset the clock.
- Try a power reset. Turn off power at the breaker for about 30 seconds, then restore it. This occasionally resolves a control board that's stuck after a power surge.
- Inspect the control board for visible damage. With power off, look for burn marks or melted components — a power surge can damage the board itself, which manages both temperature regulation and the timer.
When it's worth calling a technician
Gas valve testing, igniter amperage checks, and control board diagnosis all require specific tools and training — attempting gas component repairs without experience is a genuine safety risk. On electric ovens, a bake element replacement is one of the more affordable and straightforward repairs once properly diagnosed, but confirming the exact cause with a multimeter first avoids paying for the wrong part.