An oven that will not heat is really one of two problems wearing the same symptom. A gas oven makes heat by opening a safety valve once its bake igniter glows hot enough to draw current, so a weak igniter leaves the oven cool even while it appears to work. An electric oven makes heat by passing current through a bake or broil element, so a broken element, a bad sensor, or a relay that will not switch stops it cold. The first thing we settle is which fuel the oven runs, because that decides almost everything that follows. On a dual-fuel range you have both worlds at once: gas on the cooktop, electric in the oven.
What Is Usually Happening
- Weak or dead gas bake igniter. The most common gas no-heat cause. As it ages it stops glowing hot enough to open the safety valve, so no gas is released and the oven stays cool.
- Failed direct spark or hot-surface ignition (DSI). Some pro-style gas ovens light by spark or a hot-surface ignitor rather than a glow bar, and a failed ignitor or module leaves the burner unlit.
- Burned-out bake or broil element. On electric ovens a blistered or broken element is the classic dead-oven part, often visible on inspection.
- Drifting temperature sensor. A sensor reading out of spec tells the control the oven is hotter than it is, so the oven under-heats or never calls for heat.
- Control relay or board fault. The relay that switches the element or valve can stop closing, or the main control can lose the bake function outright.
- Safety valve or gas supply issue. Less often, the valve itself sticks or the gas supply to the oven is restricted, which we confirm before any part is ordered.
Notes by Brand
The gas-versus-electric split holds on every oven, but the parts and the way faults surface differ by make. Here is how it tends to read across the roster we service around Johns Creek.
- Wolf. Dual-fuel ranges pair a gas cooktop with an electric oven, so a no-heat oven is usually an element, sensor, or relay. The gas GR ranges use spark ignition we test at the module.
- Viking and La Cornue. Pro-style and hand-built gas ovens where a weak bake igniter or the safety valve is the usual cause, diagnosed by symptom rather than a code.
- Thermador and Monogram. These post F-series fault codes and can flag a stuck relay or an out-of-range sensor outright, which shortens the diagnosis.
- Miele and Gaggenau. European electric ovens whose control and door lock strongly affect heating. Gaggenau and Miele surface fault codes we read on arrival.
- Dacor and KitchenAid. Dacor Modernist and dual-fuel ranges and KitchenAid ovens fail most often at the bake igniter or element, with newer models showing a panel code.
| Symptom | Likely Cause | Fix |
|---|---|---|
| Gas oven clicks or glows but stays cool | Weak bake igniter not opening the safety valve | Measure igniter current draw, verify the valve, fit an OEM igniter |
| Electric oven dead, element not glowing | Burned-out bake or broil element | Test element continuity, replace the failed element |
| Oven under-heats or runs cool | Drifting temperature sensor | Test sensor resistance against spec, replace if out of tolerance |
| Oven will not call for heat at all | Control relay or main board fault | Test the relay and control logic, replace the faulty part |
| Pro gas burner will not ignite | Spark or hot-surface ignition (DSI) module failure | Test the ignitor and module, replace the failed component |
If your gas oven lights with a delayed thump, smells of gas, or fails to ignite while you still hear gas flowing, turn it off, ventilate the kitchen, and do not keep trying to light it. Raw gas can pool before it catches. Leave the oven off and book service so a technician can find and correct the fault safely. An electric oven with a dead element is not a hazard, but any gas smell should always be treated as urgent.