Oven not heating is a failure with a short list of culprits and one important safety rule: on a gas oven, the diagnosis involves the combustion path, and that is not a homeowner repair. On an electric oven the usual suspect is the bake element, which often fails visibly. Between those two, seven causes account for nearly every no-heat and won’t-hold-temperature call — and two of them are not the oven at all.
This is a deep-dive guide in Unitech’s appliance repair series. For whether the repair is worth doing, see repair or replace.
Key Takeaways
- A bake element usually fails where you can see it. Blistering, a bright spot, or a visible break means the element — the most common electric oven no-heat cause and a straightforward replacement.
- An igniter that glows but produces no flame is still a failed igniter. It has weakened past the current draw needed to open the gas safety valve. Glowing does not mean working.
- “Not heating” is often “not heating accurately.” A drifted temperature sensor makes the oven run cold and preheat forever, which people report as a heating failure.
- Two of the seven causes are not the appliance — a half-tripped double-pole breaker, or a door that no longer seals. Unitech charges no labor when the fault is the electrical supply.
- Oven and double oven repair labor runs $175–$295, with built-in wall ovens toward the top because of access.
Three Checks Before You Call
- Look at the element with the oven set to bake. An electric bake element should glow evenly along its full length within a few minutes. Blistering, a bright spot, or no glow at all is your answer.
- Check both halves of the breaker. Electric ranges use a double-pole breaker. If one half trips, the clock, light and cooktop can all work normally while the oven has no heat. Switch it fully off, then on.
- Confirm it is not in a lock or delay mode. Sabbath mode, a delayed-start setting, or an incomplete self-clean cycle will all prevent heating, and all three are easy to trigger accidentally.
The Seven Causes
1. Failed bake element (electric)
The workhorse failure. The element is a resistance coil that degrades with thermal cycling and eventually breaks. It commonly fails visibly — a blister, a bright localised glow, or a clean break. A failed bake element with a working broil element produces the classic symptom of an oven that browns the top of a dish but never cooks it through.
2. Failed igniter (gas)
The most common gas oven failure by a wide margin. The igniter has two jobs: glow hot enough to light the gas, and draw enough current to open the safety valve. As it ages it can still glow while no longer drawing enough current — so the burner never lights. That is why “it glows, so the igniter must be fine” is the most common wrong conclusion in oven diagnosis.
Gas components are not a homeowner repair. The diagnosis involves the gas supply and the combustion path.
3. Drifted or failed temperature sensor
A thin probe inside the oven cavity reports temperature to the control board. As it drifts, the oven believes it is hotter than it is and cuts heat early — producing endless preheats, undercooked food, and complaints that the oven “isn’t heating” when it is heating, just not enough. Many ovens allow a calibration offset for small drift; a sensor reading well out of range needs replacing.
4. Failed thermostat or safety valve
On older ovens a mechanical thermostat regulates the cycle; on gas models a safety valve releases gas only once the igniter proves itself. Either failing open means no heat at all. Both are diagnosable with the right meter and neither should be guessed at.
5. Control board or timer failure
Less common than people assume, and the part most often replaced unnecessarily. When a control fails in a way that never calls for heat, the result is indistinguishable from a dead element. This is precisely why a real diagnostic — testing the component rather than inferring from the symptom — is cheaper than a control board you did not need.
6. Lost leg of the 240-volt supply (electric)
Electric ranges pull 240 volts for heating elements and 120 for the clock, light and controls. Lose one leg — a half-tripped breaker, a worn outlet, a damaged cord — and the oven lights up and behaves normally but never gets hot. This is not an appliance fault, and Unitech charges no labor when the cause turns out to be the breaker, the outlet, or the supply.
7. Worn door gasket or misaligned door
An oven that heats but cannot hold temperature is often just leaking it. A hardened, torn or missing gasket, or hinges that have sagged enough that the door no longer sits square, lets heat escape continuously. The oven runs constantly, food cooks unevenly, and the symptom reads as a heating problem. Cheap to fix and easy to overlook.
Why This Turns Up More in Some Houston Homes
Built-in wall ovens carry more labor than freestanding ranges. Reaching the components means pulling a heavy unit out of cabinetry without damaging the surround, which is why the same failure costs more in a remodelled kitchen. That is common across the master-planned communities of The Woodlands and the custom homes in and around Cypress.
Builder-grade ranges installed during the growth years are reaching element-failure age together. Across Katy and the corridors built out between 2005 and 2015, original appliance packages are now well into the second half of their service lives — and heating elements are among the first components to go.
Premium ranges need brand-specific training. Thermador, Viking, Gaggenau, Wolf and Miele use proprietary control architectures and specialised parts, and labor on those runs 10–20% higher.
What Oven Repairs Cost
Unitech labor for oven and double oven repair runs $175–$295, flat-rate from the Original Blue Book for Major Appliance Job Rates, with parts quoted separately after diagnosis. Freestanding range repair and stove repair run $165–$265 because access is easier; separate cooktop repair is its own job class. Full rates by appliance are in the appliance repair cost guide.
Gas ranges average about 15 years of service life and electric ranges about 13 — the longest of the major appliances. A single component failure inside that window is almost always worth repairing. Check yours against the appliance lifespan chart before deciding.
About Unitech Appliance Repair
Unitech Appliance Repair services major and built-in home appliances across Houston and surrounding communities within a 35-mile radius. Labor is quoted flat-rate and published upfront on the pricing page, every repair carries a 90-day parts-and-labor warranty, and technicians are available 8:00 a.m. to 7:00 p.m., seven days a week.
Get the Oven Working Again
Call (713) 333-0343 and describe exactly what it does — “element does not glow,” “igniter glows but no flame,” and “heats but runs cold” point at three different components and three different parts on the truck. Have the model number ready; it is usually behind the storage drawer or on the door frame. Book online or see full rates on the pricing page.