An oven fault rarely announces its cause. A cake that sinks, a roast that takes an extra hour, a preheat that never finishes, or a door that stays locked after self-clean can each come from several different parts. The good news is that the list is short. This guide covers electric and gas ovens, whether wall ovens or the oven half of a range: how to tell which part is likely at fault, how to test the temperature properly, what self-clean does to weak parts, and which checks are safe to do yourself.
Start here: gas smell or burning smell
If you smell gas, do not try to light anything, do not flip switches, and do not look for the leak. Leave the house and call your gas utility's emergency line, which is printed on your gas bill, or 911 from outside. Oven troubleshooting can wait.
If you smell hot electrical insulation or see sparks from an element, turn the oven off and switch off its breaker.
Electric or gas?
Many Austin-area homes are all-electric, while others have natural gas service. The two oven types fail differently, so it matters which you have. If you are not sure, look behind the range or in the cabinet below a wall oven for a gas line and shutoff valve.
Electric ovens
An electric oven has a bake element at the bottom (sometimes hidden under the floor panel) and a broil element at the top. Many convection models also have a third element around the rear fan.
- No heat on bake, broil works: the bake element is the usual suspect. With the oven off and cool, look at the exposed element for a blister, a split or a burned spot. A visibly damaged element is a clear answer. An element can also fail without visible damage.
- Only the top browns, bottom stays pale: again points at the bake element, since preheat on many models uses both.
- Convection mode does not heat evenly: check whether the rear fan turns. A fan that does not spin or a failed convection element changes baking results even when the display looks normal.
Gas ovens
Most modern gas ovens use a glow-bar igniter, sometimes called a hot surface igniter. It is a key point to understand: the igniter does two jobs. It heats up to light the gas, and it also has to draw enough electrical current to open the gas safety valve.
As an igniter ages, it can still glow bright orange while drawing too little current to open the valve. The result is the classic complaint: the igniter glows, but no flame appears, or the flame lights only after a long delay. Many owners assume a glowing igniter is a working igniter. Often it is not.
Other gas oven faults include a failed gas safety valve and, less often, a problem with the spark module on models that use spark ignition. Gas valve and connection work belongs with a technician.
Oven runs hot or cold
Before assuming a fault, measure. Oven dials and displays are not a thermometer.
- Place an inexpensive oven thermometer on the center rack.
- Set the oven to 350°F and let it run for about 20 minutes after it signals it is preheated.
- Read the thermometer several times over another 20 minutes. Ovens cycle, so the temperature will swing above and below the set point. Look at the average.
If the average is off by a modest amount, most electronic ovens let you adjust a temperature offset from the control panel. The owner's manual explains the button sequence. That is not a repair, just calibration.
If the reading is far off, erratic, or the oven overshoots badly, the temperature sensor is a likely cause. It is a thin probe mounted on the back wall inside the cavity. A sensor that has been bent or damaged by cleaning, or one that has drifted with age, sends the control a wrong reading. A control board relay that sticks can also cause runaway heating, which is a reason to turn the oven off and not use it until it is checked.
The self-clean trap
The self-clean cycle heats the cavity far above normal cooking temperatures to burn off residue. That is hard on components that are already near the end of their life. Problems that commonly surface during or after a self-clean:
- Door stays locked. The lock motor or lock switch may have failed, or the control has not seen the oven cool. Let it cool completely. Then try turning the breaker off for a minute and back on.
- Oven completely dead after self-clean. Many ovens have a thermal fuse that cuts power when the cavity or controls overheat. A blown thermal fuse can leave the display blank or the oven unable to heat.
- Element or igniter fails right after. The extra heat finished off a weak part.
A practical tip: do not run self-clean the day before you need the oven for a holiday meal or a gathering. If you want to use it, run it a week or two ahead so there is time for a repair if something fails.
Never force a locked oven door open. The lock is protecting you from a cavity that may still be extremely hot.
After storms and power outages
When power flickers during a summer thunderstorm or returns after an outage, electronic oven controls can freeze, show a code, or lose settings. Try this first:
- Turn the oven's breaker off.
- Wait a few minutes.
- Turn it back on and reset the clock.
If the display is blank, garbled or the oven will not respond after a reset, the control board or its power supply may have been damaged. A whole-house surge protector is worth discussing with an electrician if storm damage keeps recurring.
Quick reference
| Symptom | Likely area | Safe to check yourself |
|---|---|---|
| Electric: no bake, broil works | Bake element | Look for visible damage with power off |
| Gas: igniter glows, no flame | Weak igniter or gas valve | Note how long it glows; do not touch gas parts |
| Temperature off | Calibration or temperature sensor | Oven thermometer test, offset adjustment |
| Door locked after self-clean | Lock assembly or control | Full cool-down, breaker reset |
| Dead display | Thermal fuse, control board, power | Breaker check and reset |
When to call
Call when an element is visibly damaged, a gas oven will not light, the temperature is far off after calibration, the door lock will not release after a reset, or the control stays dead. Anything involving gas connections, internal wiring or the control board should be handled by a technician.
How an oven fault is confirmed
The technician confirms the complaint, checks power or gas supply, then tests the specific parts: element resistance, igniter current draw, sensor readings, lock operation and control outputs. Tell them whether it is gas or electric, what the thermometer test showed, and whether the problem started during or after a self-clean. The model label on most ovens is on the frame behind the door or inside the storage or warming drawer; a photo of it helps.
Our oven repair service covers wall ovens and freestanding units. If the problem is on the cooktop side of a range, see range repair, and for a pro-style range, Wolf appliance service. A wall oven paired with a built-in microwave has its own safety rules on the microwave side, covered in the microwave guide. Call or book online.