Ovens fail in a small number of ways, and the symptom usually points at one part long before anyone takes a panel off. The trick is to read the symptom carefully instead of guessing. A burned-out element, a drifting sensor and a dead control board can all be described as "the oven isn't working," yet each one behaves differently once you watch it for ten minutes.
Most homes around Tampa cook on electric ranges and wall ovens, so this guide leads with electric. Gas ovens get their own section further down.
Before you touch anything
Turn the oven off and let it cool completely. For an electric oven, switch off its double breaker at the panel; unplugging a freestanding range is rarely practical because the cord sits behind a heavy unit. For a gas oven, close the shutoff valve on the gas line behind the range as well as cutting power.
If you smell gas at any point, don't flip switches or try to find the leak. Get everyone outside, then call 911 or your gas company from a safe distance.
Never disable the door lock, a thermal fuse or any safety switch to make the oven run. Those parts exist because an oven can reach temperatures that start fires.
Watch what the oven actually does
Set the oven to bake at 350°F with the door closed and give it a few minutes. Then look and listen.
- •Lower element (if exposed) stays dark. On a working electric oven the bake element glows a dull orange as it cycles. No glow at all, with the display counting normally, points at the element or the circuit feeding it.
- •Broil works, bake doesn't. This split is a good clue. Both elements share the control, so a working broil element makes a failed bake element more likely than a dead board.
- •It heats, but slowly and never quite reaches the set point. Often an element that has partly failed, or a door that isn't sealing, or a convection fan that has stopped.
- •It overshoots and burns food. Usually the temperature sensor or the control that reads it, not the elements.
- •Nothing at all: dark display, no fan, no heat. Start with power. A tripped breaker, a failed thermal fuse or a damaged control board are the usual suspects.
Hidden bake elements
Many newer ovens have a smooth floor with the bake element tucked underneath. You can't see it glow, so judge it by feel and time instead: does the floor of the oven warm up, and does the preheat finish in a reasonable time? A hidden element that has failed still needs to be reached from below or behind, which on most models means pulling the range out and taking off the rear or lower panel.
Checking an exposed element
With the breaker off and the oven cool, look along the full length of the bake and broil elements. A failed element often shows its damage: a blister, a split in the sheath, a spot that looks melted or a section that has bubbled. If you see that, you've likely found your fault.
An element can also fail without a visible mark. A technician confirms it with a meter by checking continuity across the terminals at the back of the oven cavity. If you are comfortable doing this yourself, follow the procedure and resistance range in your model's service sheet, which is often folded inside the range or behind the lower drawer.
The temperature sensor
The thin metal probe on the back wall of the oven, usually near the top corner, tells the control how hot the cavity is. As it heats, its resistance rises in a predictable way. If that reading drifts, the control believes the oven is hotter or cooler than it really is, and it cycles the elements to the wrong point.
Signs of a sensor problem:
- •An oven that runs consistently hot or cold by a large margin, not just a few degrees.
- •An error code on the display that the owner's manual ties to the sensor circuit.
- •A probe that has been bent, pushed against the wall or has a damaged lead.
A small difference is not a fault. Most electric ovens let you set a temperature offset from the control panel, and the owner's manual lists the button sequence. If an oven thermometer in the center of the middle rack shows the oven averaging a few degrees off, an offset is all it needs. Read the thermometer after the oven has cycled a few times rather than right at the preheat beep, because the cavity swings above and below the set point by design.
The self-clean cycle and the thermal fuse
A lot of ovens stop working right after a self-clean. The cycle runs the cavity much hotter than any baking temperature, and that heat can find a weak element, a tired door lock motor or the thermal fuse. On many models the thermal fuse is a one-time device: once it opens, the oven goes dead until the fuse is replaced and the reason it opened is found.
If your oven quit during or right after self-clean, or the door stays locked after the cycle ends, turn the breaker off for a few minutes and back on. If the door is still locked or the oven still won't heat, leave it for a technician. Forcing a locked door can break the latch mechanism.
Gas ovens
Gas ranges are less common in Hillsborough County homes than electric ones, but plenty of kitchens have them. The usual bake failure on a modern gas oven is the igniter.
A gas oven with a glow-bar igniter works like this: the igniter heats up and draws current, and that current is what lets the gas safety valve open. As an igniter ages it may still glow orange but draw too little current to open the valve. The result is an oven that glows and clicks but never lights, or one that takes a very long time to light.
If the igniter glows for a minute or more without a flame, turn the oven off, close the gas valve and call for service. Do not hold a match to the burner. Gas oven work involves gas fittings and should be done by someone qualified to test them for leaks afterward.
The control board and storm season
Electronic oven controls are sensitive to voltage spikes. Summer afternoon thunderstorms bring frequent lightning to the area, and a nearby strike can travel in on the power lines and damage a control board. A display that is scrambled, unresponsive or blank after a storm, while the breaker is on, is worth reporting that way when you book. A whole-home surge protector installed by an electrician lowers that risk.
If the power flickered and the oven now shows a blinking clock or an odd code, try resetting the breaker before anything else. After a longer outage, the power outage guide covers what to check in the rest of the kitchen.
Common questions
Is a cracked oven door glass dangerous?
The inner glass panel takes most of the heat. A crack there can spread and the glass can shatter when the oven heats. Stop using the oven until the panel is replaced.
My oven takes much longer to preheat than it used to. Is that a fault?
It can be. A preheat that has crept from a reasonable time to twice as long often means one element is weak, or a convection fan has stopped. It can also be a door gasket that has hardened and no longer seals.
Should I repair an older oven or replace it?
That depends on the part, its availability and the condition of the rest of the range. Our repair or replace guide walks through how to weigh it.
When to book a visit
If you've confirmed the breaker is on, tried a reset, and the oven still won't heat, overheats or shows a code, it's time for a technician. Note the model number from the frame behind the door or inside the storage drawer, and what the oven does when you set it to bake. That information shortens the visit. You can read more on our oven repair page or book online.