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TL;DR — A toaster oven that won’t turn on or heat usually has one of a handful of fixable causes: no power (dead outlet, tripped breaker, or a timer/dial not set), a tripped thermal fuse or thermostat, a broken heating element, or worn door-switch and internal wiring. Start at the outlet and work inward. Element and fuse failures are the most common on units several years old, and on inexpensive ovens replacement often beats repair. For a new one, see our best toaster oven guide.
The HomeWhisk editorial team researches kitchen appliances by studying how their electrical and heating components are built, manufacturer service information, and aggregated owner reports from major retailers and repair communities. Toaster ovens are simple machines — a timer, a thermostat, and one or two resistive heating elements — which means most failures trace to a short list of parts. Here is how to work through them safely, from the easiest checks to the ones that decide whether to fix or replace.
First Checks: Power and Settings
Before assuming anything is broken, rule out the simplest causes. A surprising share of “not working” toaster ovens (across Black and Decker, Hamilton Beach, Cuisinart, and Oster models alike) are simply not getting power or not fully set.
- Test the outlet. Plug a lamp or phone charger into the same socket. Toaster ovens draw 1,200-1,800 watts, so they’re often on the same circuit as other high-draw appliances. A GFCI outlet may have tripped — press its reset button — or the breaker may have flipped.
- Check the timer and function dial. Many toaster ovens will not power the elements unless the timer is turned past zero and a function (bake, toast, broil) is selected. If your unit has an “on” position that requires the timer to be wound, the elements stay cold until you do.
- Inspect the cord and plug. Look for frayed insulation, scorch marks, or a loose plug. A damaged cord is both a failure point and a hazard.
If the outlet is live, the settings are correct, and the oven still does nothing, the problem is internal. Unplug it before going further. If troubleshooting feels beyond you, our best toaster oven guide covers reliable replacements.
The Thermal Fuse: The Most Common Silent Killer
If the oven has power at the outlet but is completely dead — no light, no heat, no fan — a blown thermal fuse is a leading suspect. The thermal fuse is a small one-time safety device wired in series with the elements. If the oven ever overheats (often from grease buildup, a stuck thermostat, or blocked vents), the fuse permanently opens the circuit to prevent a fire, and the whole oven goes dark.
A blown thermal fuse does not reset. It has to be replaced, and it usually signals an underlying cause — so if you replace one, clean out grease and check the thermostat too, or the new fuse will blow again. Testing requires unplugging the unit, opening the housing, and checking the fuse for continuity with a multimeter (a good fuse reads near zero ohms; a blown one reads infinite/open). On a budget oven, the labor and part cost often approach the price of a new unit.
Heating Element Problems: Not Getting Hot Enough
If the oven powers on and the light works but it won’t heat, heats weakly, or only one element glows, suspect the heating elements. Most toaster ovens have two: one on top (for broiling and browning) and one on the bottom (for baking). They’re nichrome resistance wire that glows orange when current passes through.
- Only the top or bottom element heats: the dead element has likely burned through. A broken element often shows a visible break, blister, or bright spot where it failed. This matches common complaints like “top heating element not working” on Black and Decker and Hamilton Beach units.
- Weak heat everywhere: more likely a failing thermostat cutting current too early, or a wiring/connection problem, than both elements failing at once.
You can test an element for continuity with a multimeter after unplugging: a working element shows resistance (typically tens of ohms); an open circuit means it’s dead. Element replacement is possible on some models but often requires disassembly and matching a specific part number. Given the cost of parts and time, many owners upgrade instead — our best toaster oven guide covers current models, and if you mainly wanted crispy results, the best air fryer guide has convection-heavy options.
Thermostat, Door Switch, and Wiring Faults
When power reaches the oven but heating is erratic — too hot, too cold, cycling strangely, or cutting out — the thermostat or door switch is often involved.
The thermostat senses cavity temperature and switches the elements on and off to hold your set point. A failing thermostat can leave the oven cold, stuck on full heat, or wildly inaccurate (“not getting hot enough” is a classic symptom). Some units have a door safety switch that cuts power to the elements when the door is open; if that switch fails or its contacts corrode, the oven may not heat even with the door shut. Finally, loose or corroded internal wiring and connectors — especially at the high-heat element terminals — can interrupt the circuit intermittently.
These faults require opening the housing and testing with a multimeter, and they carry real electrical risk. If you’re not comfortable with that, it’s safer to replace the unit. See our best toaster oven guide.
Repair vs. Replace: When to Stop Troubleshooting
Toaster ovens occupy an awkward spot: they’re simple enough to repair but cheap enough that repair frequently isn’t worth it. As a rule of thumb, if the fix is a free reset (breaker, GFCI, timer) or a cheap accessible part, repair it. If it requires disassembly, a multimeter, and a replacement element, thermostat, or fuse — and the oven is several years old or was inexpensive to begin with — replacement is usually the smarter call. Safety matters too: repeated fuse blows, scorched wiring, or arcing mean the unit should be retired, not nursed along.
If you decide to replace, our best toaster oven guide has the current picks. Depending on how you actually cook, an best air fryer (for fast crisping), an best instant pot (for hands-off batch cooking), a best blender, or a best stand mixer may cover the jobs you were leaning on the toaster oven for.
Frequently Asked Questions
Why won’t my toaster oven turn on at all?
A completely dead toaster oven — no light, no heat — usually means it isn’t getting power or an internal safety device has cut the circuit. Test the outlet with another device, reset the GFCI and breaker, and confirm the timer is wound past zero and a function is selected. If power is confirmed but the oven stays dead, a blown thermal fuse is the most likely cause; it opens the circuit permanently after an overheat and must be replaced, not reset.
How do I replace a toaster oven heating element?
After unplugging and letting it cool, you open the outer housing, locate the element terminals (usually at the back or sides), disconnect the wiring, and remove the mounting hardware, then fit an exact replacement element and reconnect. The catch is sourcing the correct part for your model and safely handling the high-heat wiring. On Black and Decker, Hamilton Beach, and similar budget units, the part and effort often cost close to a new oven, so many owners replace the appliance instead.
What is a thermal fuse and why did mine blow?
A thermal fuse is a small single-use safety component wired in series with the heating elements. If the oven overheats past a set temperature, the fuse melts open and kills power to prevent a fire. It commonly blows because of grease buildup insulating the cavity, a stuck thermostat that won’t shut the elements off, or blocked vents. Because it signals an underlying problem, replacing the fuse alone without fixing the cause usually leads to it blowing again.
Why is my toaster oven not getting hot enough?
Weak or insufficient heat most often points to a failing thermostat that’s cutting current to the elements too early, or one of two heating elements having burned out so only half the oven heats. Loose or corroded wiring at the element terminals can also throttle heat. Check whether both elements glow evenly; if one stays dark, it’s likely dead. If both glow but the oven runs cool, suspect the thermostat or a wiring fault.
Why does only the top element of my toaster oven work?
If the bottom element stays cold while the top glows (or vice versa), the dead element has almost certainly burned through — look for a visible break, blister, or scorched spot along the nichrome coil. It’s also possible the function setting only engages one element (for example, “broil” uses the top only), so confirm you’re on “bake,” which should use both. If the correct setting still leaves one element dark, that element needs replacement.
Is it worth repairing a toaster oven?
It depends on the fault and the oven’s price. Free fixes — resetting a breaker or GFCI, winding the timer, reseating a plug — are always worth trying. But repairs needing disassembly and replacement parts (element, thermostat, thermal fuse) often cost close to a new budget oven once you factor in the part and your time. If the unit is several years old, was inexpensive, or shows scorched wiring or repeated fuse failures, replacement is the safer, more economical choice.
The Bottom Line
Most “toaster oven not working” problems fall on a spectrum from trivial to terminal. Start with the free checks — outlet, GFCI, breaker, timer, and function dial — because they solve a large share of cases. If the oven has confirmed power but stays dead, suspect a blown thermal fuse; if it powers on but won’t heat properly, look at the elements, thermostat, door switch, and wiring. The deeper you go, the more a multimeter and disassembly are required, and the more sense replacement makes on an inexpensive unit. When repair isn’t worth it, our best toaster oven guide has the current picks.
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Deeper Dive: Our Top Picks
Our Top Picks
Breville Mini Smart Oven BOV450XL: 8-Function Countertop Toaster Oven for Small Kitchens, Stainless Steel
The Breville BOV450XL uses Element iQ technology with 5 quartz elements to direct heat exactly where needed across 8 cooking functions, from toast to roast chicken. Buy it if you need a space-saving countertop oven that handles everything from 4-slice toast to 12-inch pizzas without sacrificing precision.
Pros and Cons
Pros
- Element iQ system directs power to specific heating zones based on the cooking function, delivering more even results than standard toaster ovens.
- Compact footprint fits under standard cabinets while still accommodating a full 12-inch frozen pizza or small roasting chicken.
- LCD display and preset functions eliminate manual temperature guessing for common kitchen tasks like reheating leftovers or baking cookies.
Cons
- 11-inch interior depth limits you to smaller baking dishes and sheet pans compared to full-size ovens.
- Single rack position during most cooking modes reduces flexibility for multi-level baking.
Breville Smart Oven Pro Convection Countertop Oven with Element IQ - 10 Functions, 6 Slice Capacity
This countertop convection oven uses 5 independent quartz elements and Element IQ technology to automatically adjust heat for precise cooking across 10 functions including pizza, slow cook, and roast. Home cooks who want to replace multiple appliances with one versatile unit that cuts cooking time by 30% should consider this model.
Pros and Cons
Pros
- 10 cooking functions cover everything from bagels to slow-cooked roasts, eliminating the need for separate toaster ovens and slow cookers.
- Element IQ technology adjusts heat intelligently for each function, preventing common issues like burnt toast edges or undercooked pizza centers.
- 1800 watt power delivers fast preheat times, and the LCD display shows exactly when the oven is ready and counts down cook time.
Cons
- At 18.5 x 16.25 x 11.25 inches, this oven requires significant counter space and may not fit under standard cabinets.
- The 1800 watt draw can trip older kitchen circuits if running simultaneously with other high-power appliances.
EmerilLagasse
Emeril Lagasse 26QT French Door Air Fryer Toaster Oven with 24 Cooking Functions and Rotisserie
This 26-quart air fryer toaster oven replaces multiple appliances with 24 preset functions including air fry, rotisserie, dehydrate, and slow cook, using 360° convection for faster, oil-free cooking. Best for families who want countertop versatility without sacrificing capacity—fits whole chickens and 12-inch pizzas with room to spare.
Pros and Cons
Pros
- Massive 26-quart capacity handles full family meals, from whole roasted chickens to multiple sheet pans at once.
- 24 one-touch presets cover everything from air frying and baking to dehydrating and slow cooking without manual temperature adjustments.
- Rotisserie function with included spit and fetch tool delivers evenly cooked, self-basting meats with crispy skin.
- French door design provides wide access and stays cooler to the touch than traditional drop-down doors.
Cons
- Large footprint requires significant counter space—measure before purchasing if your kitchen is compact.
- Learning curve for optimal rack positioning across different cooking modes may require trial and error initially.
Cuisinart
TOB-40N Toaster Oven Broiler: 6-Slice Capacity
This 1800-watt toaster oven handles toast, baking, and broiling in a 0.5 cubic foot interior that fits 6 slices or an 11-inch pizza, with Always Even Shade Control that adjusts timing automatically for uniform browning. Buy it if you need reliable countertop cooking without convection features and want consistent toast quality backed by actual temperature monitoring.
Pros and Cons
Pros
- Always Even Shade Control adjusts cooking time in real time based on cavity temperature, delivering consistent toast darkness across multiple batches.
- 0.5 cubic foot capacity accommodates 6 slices or an 11-inch pizza, enough for small families without monopolizing counter space.
- Auto-slide rack extends when the door opens, eliminating the need to reach into a hot oven to pull out food.
- Non-stick interior and removable crumb tray simplify cleanup after baking or broiling greasy foods.
Cons
- No convection fan, so baking times run longer and heat distribution is less uniform than convection models in the same price range.
- Manual dial controls lack a digital timer with automatic shutoff, requiring you to monitor cooking progress or use a separate timer.
4-Slice Toaster Oven for Small Kitchens – BLACK+DECKER TO1313SBD with EvenToast Technology
This compact toaster oven fits a 9-inch pizza or four bread slices and uses EvenToast Technology to eliminate burnt edges and undercooked centers. Best for apartment dwellers and small kitchens who need bake, broil, toast, and keep warm functions without sacrificing counter space.
Pros and Cons
Pros
- EvenToast Technology delivers consistent browning edge to edge, solving the common problem of unevenly toasted bread in budget toaster ovens.
- The included baking and broiler pan fits the interior perfectly, eliminating the guesswork of finding compatible cookware.
- Natural convection airflow speeds up cooking and produces crispier results than traditional toaster ovens without convection.
- Simple manual dials require no learning curve and work reliably without the failure points of digital controls.
Cons
- Outer surfaces become very hot during use, requiring oven mitts and careful placement away from walls or cabinets.
- The 30-minute maximum timer requires resetting for longer baking tasks like roasting chicken or slow-cooking casseroles.
Editors' Picks
Breville Mini Smart Oven BOV450XL: 8-Function Countertop Toaster Oven for Small Kitchens, Stainless Steel
Breville Mini Smart Oven BOV450XL: 8-Function Countertop Toaster Oven for Small Kitchens, Stainless Steel
The Breville BOV450XL uses Element iQ technology with 5 quartz elements to direct heat exactly where needed across 8 cooking functions, from toast to roast chicken. Buy it if you need a space-saving countertop oven that handles everything from 4-slice toast to 12-inch pizzas without sacrificing precision.
$159.95 at AmazonEditors' Favorite
Brand Name: Breville Included Components: 10"x10" Enamel Baking Pan Model Name: Mini Smart Oven Model Number: BOV450XL Warranty Description: 1 Year Limited Product Warranty Global Trade Identification Number: 00021614054050 UPC: 021614054050 Manufacturer: Breville Part Number: BOV450XL Unit Count: 1.0 Count Item Type Name: Mini Smart Oven and Countertop Toaster Oven Best Sellers Rank: #3,360 in Kitchen & Dining (See Top 100 in Kitchen & Dining) #7 in Toaster Ovens ASIN: B006CVVA7I Customer Reviews: 4.5 4.5 out of 5 stars (9,122) 4.5 out of 5 stars Color: BOV450XL Door Style: Dropdown Door Other Special Features of the Product: Automatic Shut-Off Wattage: 1800 watts Control Type: Knob Control Power Source: Electric Temperature Range: 50-250 Degrees Celsius Number of Shelves: 1 Item Dimensions D x W x H: 13.6"D x 16"W x 8.8"H Capacity: 440 Cubic Inches Item Weight: 10.7 Pounds Cable Length: 36 Inches Size: Mini Smart Oven Material: Stainless Steel Finish Type: Silver Door Material Type: Stainless Steel Brand: Breville Product Dimensions: 13.6"D x 16"W x 8.8"H Special Feature: Automatic Shut-Off
Shop NowBreville Smart Oven Pro Convection Countertop Oven with Element IQ - 10 Functions, 6 Slice Capacity
Breville Smart Oven Pro Convection Countertop Oven with Element IQ - 10 Functions, 6 Slice Capacity
This countertop convection oven uses 5 independent quartz elements and Element IQ technology to automatically adjust heat for precise cooking across 10 functions including pizza, slow cook, and roast. Home cooks who want to replace multiple appliances with one versatile unit that cuts cooking time by 30% should consider this model.
$269.95 at AmazonGreat Value
Brand Name: Breville Included Components: Toaster oven^12" x 12" enamel broiling rack^12" x 12" enamel baking pan^13" non-stick pizza pan^Wire rack^Crumb tray Model Name: Smart Oven Pro Model Number: BOV845BSS Warranty Description: 1 year limited product warranty Global Trade Identification Number: 00021614055590 UPC: 021614055590 Manufacturer: Breville Part Number: Breville BOV845BSS Unit Count: 16.0 Ounce Item Type Name: Countertop Oven Best Sellers Rank: #6,102 in Kitchen & Dining (See Top 100 in Kitchen & Dining) #4 in Convection Ovens ASIN: B00XBOXVIA Customer Reviews: 4.6 4.6 out of 5 stars (11,131) 4.6 out of 5 stars Other Special Features of the Product: Indicator Light Wattage: 1800 watts Control Type: Knob Control Power Source: electric Number of Shelves: 1 Item Dimensions D x W x H: 15.91"D x 18.94"W x 10.94"H Capacity: 0.49 Cubic Feet Item Weight: 22.8 Pounds Size: One Size Material: Stainless Steel Finish Type: Brushed Door Material Type: Stainless Steel Color: Brushed Stainless Steel Door Style: Dropdown Door Brand: Breville Product Dimensions: 15.91"D x 18.94"W x 10.94"H Special Feature: Indicator Light
Shop NowEmerilLagasse Emeril Lagasse 26QT French Door Air Fryer Toaster Oven with 24 Cooking Functions and Rotisserie
EmerilLagasse
Emeril Lagasse 26QT French Door Air Fryer Toaster Oven with 24 Cooking Functions and Rotisserie
This 26-quart air fryer toaster oven replaces multiple appliances with 24 preset functions including air fry, rotisserie, dehydrate, and slow cook, using 360° convection for faster, oil-free cooking. Best for families who want countertop versatility without sacrificing capacity—fits whole chickens and 12-inch pizzas with room to spare.
$199.99 at AmazonSpecial Features: Automatic Shut-Off, Programmable, Temperature Control, Timer Output Wattage: 1700 Watts Wattage: 1700 watts Voltage: 120 Volts Control Method: Touch Min Temperature Setting: 75 Degrees Fahrenheit Controller Type: Touchscreen Max Temperature Setting: 500 Degrees Fahrenheit Air Frying Technology: True Item Dimensions D x W x H: 16.9"D x 15.8"W x 14.8"H Capacity: 24.6 Liters Item Weight: 26.5 Pounds Size: Extra Large Material: Stainless Steel Has Nonstick Coating: No Outer Material: Stainless Steel Is the item dishwasher safe?: No Inner Material: Stainless Steel Recommended Uses For Product: Air Fry, Bake, Broil, Dehydrate, Roast Brand Name: Emeril Model Name: Extra Large 26 QT French Door Air Fryer Oven Model Number: 4-00675-02X-VN UPC: 752356835682 Global Trade Identification Number: 10752356835689, 20752356835686 Configuration: Air Fryer Toaster Oven Combo with 24 Functions and 7 Accessories Manufacturer: Emeril Lagasse Part Number: 4-00675-02X-VN Item Type Name: Air Fryer Included Components: Rack, Bake Pan, Drip Tray, Crisper Basket, Rotisserie Spit, Fetch Tool Unit Count: 1.0 Count Best Sellers Rank: #1,183 in Kitchen & Dining (See Top 100 in Kitchen & Dining) #4 in Toaster Ovens ASIN: B09B7SB46R Customer Reviews: 4.4 4.4 out of 5 stars (16,823) 4.4 out of 5 stars Color: Stainless Steel Special Feature: Automatic Shut-Off, Programmable, Temperature Control, Timer Product Dimensions: 16.9"D x 15.8"W x 14.8"H
Shop NowCuisinart TOB-40N Toaster Oven Broiler: 6-Slice Capacity
Cuisinart
TOB-40N Toaster Oven Broiler: 6-Slice Capacity
This 1800-watt toaster oven handles toast, baking, and broiling in a 0.5 cubic foot interior that fits 6 slices or an 11-inch pizza, with Always Even Shade Control that adjusts timing automatically for uniform browning. Buy it if you need reliable countertop cooking without convection features and want consistent toast quality backed by actual temperature monitoring.
$108.17 at AmazonBrand Name: Cuisinart Included Components: Toaster Oven Model Name: Cuisinart TOB-40N Custom Classic Toaster Oven Broiler Model Number: TOB-40NNAS Warranty Description: 2 Year limited warranty Global Trade Identification Number: 00086279098955, 10086279246735 UPC: 086279246738 086279098955 Manufacturer: Cuisinart Part Number: TOB-40N Item Type Name: Toaster Oven Broiler Best Sellers Rank: #3,947 in Kitchen & Dining (See Top 100 in Kitchen & Dining) #8 in Toaster Ovens ASIN: B004JMZGM2 Customer Reviews: 4.2 4.2 out of 5 stars (7,494) 4.2 out of 5 stars Color: Black Door Style: Dropdown Door Other Special Features of the Product: Manual Wattage: 1800 watts Control Type: touch Power Source: Corded Electric Temperature Range: 200 - 450 Degrees Fahrenheit Number of Shelves: 2 Item Dimensions D x W x H: 11.74"D x 17"W x 8.35"H Capacity: 0.5 Cubic Feet Item Weight: 12.9 Pounds Size: 17 Inch Material: Stainless Steel Finish Type: Brushed Door Material Type: Stainless Steel Brand: Cuisinart Product Dimensions: 11.74"D x 17"W x 8.35"H Special Feature: Manual
Shop Now4-Slice Toaster Oven for Small Kitchens – BLACK+DECKER TO1313SBD with EvenToast Technology
4-Slice Toaster Oven for Small Kitchens – BLACK+DECKER TO1313SBD with EvenToast Technology
This compact toaster oven fits a 9-inch pizza or four bread slices and uses EvenToast Technology to eliminate burnt edges and undercooked centers. Best for apartment dwellers and small kitchens who need bake, broil, toast, and keep warm functions without sacrificing counter space.
$59.99 at AmazonBrand Name: BLACK+DECKER Included Components: Toaster Oven Model Name: TO1756SB-TH Model Number: TO1756SB-TH UPC: 050875809864 Manufacturer: Applica Incorporated/DBA Black and Decker Part Number: TO1756SB Unit Count: 1.0 Count Item Type Name: Toaster Oven Best Sellers Rank: #794 in Kitchen & Dining (See Top 100 in Kitchen & Dining) #3 in Toaster Ovens ASIN: B00GGFHH4U Customer Reviews: 4.4 4.4 out of 5 stars (22,096) 4.4 out of 5 stars Color: 4 Slice Stainless Steel Door Style: Dropdown Door Other Special Features of the Product: Manual Wattage: 1150 watts Control Type: Knob Power Source: electricity Temperature Range: 4.5E+2 Degrees Fahrenheit Number of Shelves: 1 Item Dimensions D x W x H: 10.8"D x 14.5"W x 8.8"H Capacity: 10 Liters Item Weight: 6.7 Pounds Size: 15.47 Inch Material: Stainless Steel Finish Type: Polished Door Material Type: Stainless Steel Brand: BLACK+DECKER Product Dimensions: 10.8"D x 14.5"W x 8.8"H Special Feature: Manual
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