Oven Not Heating Up? Here’s Why and What to Do
Safety notice
This guide covers basic external checks only. Ovens involve high-voltage electrical components, gas lines (in gas models), and extreme heat. Do not open the oven casing, disconnect wiring, or attempt internal repairs yourself. If your oven is gas-powered and you smell gas, leave the house immediately and call 911 or your gas utility. Max Appliance Repair Miami is not responsible for any damage or injury resulting from DIY repair attempts.
In this article
- Why your oven is not heating up
- What you can check yourself
- Common causes and repair costs in Miami
- Gas vs electric ovens: different failure points
- When to call a technician
- Frequently asked questions
Your oven is set to 400 degrees but the inside is barely warm. Or it will not heat at all. This is one of the most common appliance problems we see in Miami homes, and in most cases the cause falls into a short list of usual suspects. A failed heating element, a bad igniter, a blown thermal fuse, or a faulty temperature sensor can all stop your oven from reaching the right temperature.
The good news is that most oven heating problems are repairable without replacing the whole unit. The not-so-good news is that diagnosing the exact cause usually requires a technician, because the components involved carry serious electrical or gas hazards. Here is what to know before you call.
Why your oven is not heating up
When an oven stops heating, the problem is almost always one of five things. The specific cause depends on whether you have a gas or electric model, but the symptoms overlap quite a bit.
1. Failed heating element (electric ovens)
Electric ovens have two heating elements: the bake element on the bottom and the broil element on top. When one of these fails, the oven either will not heat at all or will only heat from one direction. A visible sign is a bake element that does not glow red when the oven is on. Sometimes you can see a crack, blister, or burn mark on the element itself.
2. Weak or failed igniter (gas ovens)
In a gas oven, the igniter has to get hot enough to open the gas valve. Over time, igniters weaken. When that happens, the oven takes a very long time to preheat or never reaches the set temperature. You might hear clicking sounds or smell a faint gas odor as the igniter tries to light the burner and fails. A weak igniter is the single most common reason gas ovens stop heating properly.
3. Blown thermal fuse
The thermal fuse is a safety device that cuts power to the oven if internal temperatures get too high. Once it blows, the oven will not heat until the fuse is replaced. This can happen after a self-cleaning cycle (which runs the oven at extremely high temperatures) or after a power surge. It is a common issue in South Florida where summer storms cause frequent electrical fluctuations.
People often ask: can a power surge damage my oven?
Yes. Power surges from lightning strikes or grid fluctuations can blow the thermal fuse, damage the control board, or fry the temperature sensor. In Miami, where summer thunderstorms are a daily event from June through September, a good surge protector on your kitchen circuit is worth the investment.
4. Faulty temperature sensor
The temperature sensor (also called the oven probe or RTD sensor) tells the control board how hot the oven cavity is. When it fails or drifts out of calibration, the oven may underheat, overheat, or cycle erratically. Some ovens will display an error code. Others will just quietly bake everything wrong.
5. Control board failure
The electronic control board is the brain of a modern oven. It processes input from the temperature sensor and controls the heating elements or gas valve. When it fails, the oven may not respond to any commands, display error codes, or behave unpredictably. Control boards are the most expensive part to replace, but they fail less often than elements and igniters.
What you can check yourself
Before calling for a repair, there are a few simple things worth checking. These will not fix internal component failures, but they rule out the easy stuff that wastes a service call.
- Check that the oven is plugged in and the breaker has not tripped. Electric ovens run on a dedicated 240V circuit. If the breaker trips, the clock and lights might still work (they run on 120V) while the heating elements get no power. Flip the breaker off and back on.
- Make sure you are using the right mode. It sounds obvious, but if the oven is set to “broil” instead of “bake,” only the top element heats. If it is set to “warm,” it will not go above 170 to 200 degrees.
- Look at the bake element. With the oven set to bake at 350 degrees, the bottom element should glow red within a few minutes. If it does not glow at all, or if you see visible damage (cracks, blisters, holes), the element has failed.
- Check the clock and display. Some ovens will not heat if the clock is not set or if a delayed start timer is accidentally engaged. Clear any timers and make sure the display shows the current time.
- Listen for the igniter (gas ovens). When you turn on a gas oven, you should hear clicking followed by a whoosh as the gas ignites. If you hear clicking but no ignition after 60 to 90 seconds, the igniter is likely too weak to open the gas valve.
Pro tip
If your oven heats but the temperature seems off, test it with a standalone oven thermometer (about $8 at any kitchen store). Set the oven to 350 and check the thermometer after 20 minutes. A reading that is 25 degrees or more off suggests a failing temperature sensor or a control board calibration issue.
Common causes and repair costs in Miami
Oven repairs in South Florida tend to run a bit higher than national averages because of demand and the cost of doing business in Miami-Dade County. Here are the typical ranges you can expect.
| Repair | Typical cost (Miami area) | Common in |
|---|---|---|
| Bake or broil element | $150 to $350 | Electric ovens |
| Igniter replacement | $150 to $300 | Gas ovens |
| Thermal fuse | $100 to $250 | Both |
| Temperature sensor | $120 to $280 | Both |
| Control board | $250 to $650 | Both |
| Diagnostic service call | $80 to $150 | All models |
Pricing note: These are estimates based on typical Miami-area rates as of 2026. Your actual quote will depend on the brand, model, part availability, and whether the job is a standard appointment or an emergency call. Always request a written estimate before authorizing any work.
Save your money
If your oven is less than 8 years old and the repair costs less than half what a replacement would run, repairing almost always makes more financial sense. A new range costs $700 to $2,500 installed. A $200 igniter replacement buys you several more years of reliable cooking.
Gas vs electric ovens: different failure points
Gas and electric ovens break in different ways. Knowing which type you have narrows the diagnosis immediately.
| Electric oven | Gas oven | |
|---|---|---|
| Most common failure | Bake element burns out | Igniter weakens over time |
| Average lifespan | 13 to 15 years | 15 to 18 years |
| Power requirement | 240V dedicated circuit | 120V + gas line |
| DIY-safe checks | Visual element check, breaker reset | Listen for igniter click, check pilot |
| Safety risk | Electrical shock (240V) | Gas leak, carbon monoxide |
In Miami-Dade County, electric ovens are more common in condos and newer construction. Gas ovens are more typical in older single-family homes, especially in neighborhoods like Coral Gables, Coconut Grove, and parts of Kendall. Either type is repairable in most cases.
Did you know?
Miami’s high humidity can accelerate corrosion on gas oven igniters and electrical connections inside electric ovens. Salt air in coastal areas like Miami Beach, Key Biscayne, and Brickell is especially rough on metal components. If you live near the water, oven parts may wear out 20 to 30 percent faster than the national average.
When to call a technician
If the simple checks above did not solve the problem, the next step is a professional diagnosis. Call a technician if:
- The oven does not heat at all and the breaker is fine
- The bake element does not glow red (electric) or the igniter clicks but gas does not light
- The oven heats but the temperature is consistently off by 25 degrees or more
- You see error codes on the display panel
- The oven trips the breaker repeatedly
- You smell gas at any point (leave the house first, then call)
Max Appliance Repair Miami services all major oven and range brands across Miami-Dade County, including Coral Gables, Kendall, Doral, Homestead, Miami Beach, and Brickell. Most oven repairs are completed in a single visit. Call (786) 733-9343 to schedule a diagnostic appointment.
Frequently asked questions
Why does my oven take so long to preheat?
A slow preheat usually means a weak igniter (gas ovens) or a partially failed heating element (electric ovens). In electric models, if only the broil element is working, the oven will eventually reach temperature but it takes much longer. A technician can test both elements and the igniter to identify which one is degrading.
Can I use my oven if only the broil element works?
Technically yes, but you should not. The broil element heats from the top only, which means food on the lower rack will cook unevenly or not at all. More importantly, a failed bake element can sometimes short-circuit, which is a fire risk. Get it replaced before using the oven regularly.
Is it worth repairing an old oven or should I replace it?
If the oven is under 12 years old and the repair costs less than half the price of a new one, repair is almost always the better call. If it is over 15 years old and needs a control board or multiple parts, replacement starts to make more sense. Our technicians will give you an honest recommendation either way. You can also read our full guide on when to repair vs replace an appliance.
My oven smells like gas but the burner lights. Is that normal?
A brief, faint gas smell when a gas oven first ignites is normal. That is unburned gas from the few seconds between the valve opening and the igniter lighting the flame. But if the smell is strong, persistent, or present when the oven is off, turn off the gas supply, open windows, leave the house, and call your gas utility or 911. Do not use the oven until a technician has inspected the gas connections.
Does the self-clean cycle damage ovens?
It can. The self-clean cycle runs the oven at 800 to 900 degrees for several hours. This extreme heat can blow the thermal fuse, warp door gaskets, and stress electronic components. Many appliance technicians recommend using the self-clean feature sparingly, no more than once or twice a year, and never right before a big cooking event like Thanksgiving or Nochebuena when you need the oven working.
If your oven is not heating up and you are in the Miami area, Max Appliance Repair can help. We service all major brands and most repairs are completed same-day. Call (786) 733-9343 or request a service appointment online.