Oven Not Heating Up? Here’s What To Check
You set the oven to heat. The light comes on, the fan runs, the display counts up to temperature. But the oven never gets hot. Or it heats a little and then stops. Or the top element glows and the bottom doesn’t. Either way, dinner isn’t cooking.
Here’s the thing most people get wrong: they assume the heating element has failed and buy a replacement before checking anything else. In reality, an oven that won’t heat has a specific fault path — and it’s completely different for gas and electric ovens. A gas oven that won’t heat is usually an igniter or gas supply fault. An electric oven that won’t heat is usually an element, thermostat, or thermal fuse fault. Checking the wrong system wastes time and money.
The good news is that the symptom narrows the fault quickly. Whether the oven is gas or electric, whether it’s the top or bottom element, and whether it heats partially or not at all — each points to a different component. Several of the checks are free.
This page covers both oven types, the checks you can perform yourself, and when a repair makes sense versus when it’s time for a new oven. If you need the complete diagnostic sequence, the full guide is linked at the bottom.
Quick Diagnosis
Gas ovens:
No heat, no glow, no sound of gas: the igniter, the gas supply, or the gas valve.
Igniter glows but the burner doesn’t light: a weak igniter — it’s glowing but not drawing enough current to open the gas valve.
Lights then goes out: a flame sensor or gas valve fault.
Oven works on grill/broiler but not on bake: the bake igniter or bake valve.
Electric ovens:
No heat at all, display works: the heating element, the thermostat, or the thermal fuse.
Top element glows, bottom doesn’t (or vice versa): that element has failed.
Heats partially, then stops: a thermostat or thermal fuse fault.
No heat and no display: a power supply or control board fault.
Oven trips the circuit breaker: a shorted element.
Both types:
Oven not reaching temperature: a thermostat or temperature sensor fault.
Oven heats unevenly: a failed element (electric) or a blocked burner (gas).
Why Your Oven Won’t Heat
An oven heats by running a heating source until a thermostat or sensor reads the target temperature, then cycling it on and off to hold that temperature. A fault anywhere in that chain stops the oven heating.
On a gas oven, the chain is: gas supply → gas valve → igniter → burner → flame sensor → thermostat. The igniter is the most common failure — it glows to light the gas, and as it ages it draws less current, so the gas valve doesn’t open even though the igniter still glows.
On an electric oven, the chain is: power supply → control board → thermostat → heating element. The element is the most common failure, followed by the thermostat and the thermal fuse.
That’s why the checks below are split by oven type. Work through the section that matches your oven.
Gas Oven: The Three Most Likely Causes
A Weak Igniter
The most common cause of a gas oven that won’t heat. The igniter is a glow-bar that heats up to light the gas. As it ages, it draws less current — and the gas valve is designed to open only when the igniter is drawing enough. So the igniter glows, but the burner never lights.
What to check:
Turn the oven on and watch the igniter through the oven door.
If it glows but the burner doesn’t light within about 90 seconds, the igniter is weak.
If it doesn’t glow at all, check the igniter circuit and the gas supply.
A replacement igniter is $30 to $80 for the part.
A Gas Supply Or Valve Fault
If the igniter glows strongly but there’s no gas, the fault is on the gas side.
What to check:
Confirm the gas supply to the house is on — check another gas appliance (the stovetop, if it’s gas).
Check the oven’s gas shut-off valve is open.
If the stovetop works but the oven doesn’t, the fault is the oven’s gas valve or its supply line.
Gas valve work requires a licensed gas fitter.
A gas valve is $50 to $150 for the part, plus fitting.
A Flame Sensor Or Thermostat Fault
If the burner lights and then goes out, or the oven won’t hold temperature, the flame sensor or thermostat is the likely fault.
What to check:
Watch whether the burner lights and then extinguishes after a few seconds.
If it lights and goes out repeatedly, the flame sensor isn’t confirming the flame.
If it lights and holds but the oven reads the wrong temperature, the thermostat or sensor is at fault.
A thermostat or sensor is $20 to $60 for the part.
Electric Oven: The Three Most Likely Causes
A Failed Heating Element
The most common cause of an electric oven that won’t heat. Ovens have two elements — a bake element at the bottom and a grill/broil element at the top. If one fails, the oven heats partially or not at all.
What to check:
Turn the oven on and watch both elements.
If one glows and the other doesn’t, the dead one has failed.
If neither glows, test both elements with a multimeter — a good element reads a low resistance, a failed one reads open.
Inspect the element for a visible break or blistering.
A replacement element is $20 to $60 for the part.
A Failed Thermostat Or Temperature Sensor
The thermostat controls the temperature. If it fails, the oven may not heat at all, or may heat to the wrong temperature, or may overheat.
What to check:
Check whether the oven heats but reads the wrong temperature on the display.
Check whether the oven heats past the set temperature.
Test the thermostat and sensor with a multimeter against the expected resistance.
A thermostat or sensor is $20 to $60 for the part.
A Blown Thermal Fuse
The thermal fuse is a safety device that cuts power if the oven overheats. If it blows, the oven is completely dead — no heat, often no display.
What to check:
Confirm the oven has power at the socket and the breaker hasn’t tripped.
Access the thermal fuse (usually behind the control panel or at the back).
Test it with a multimeter — a good fuse reads continuity, a blown one reads open.
A thermal fuse is $5 to $20.
What The Results Tell You
Gas: igniter glows but no flame: a weak igniter. Replace it.
Gas: no glow, gas supply confirmed: an igniter circuit or gas valve fault.
Gas: burner lights then goes out: a flame sensor or gas valve fault.
Electric: one element glows, one doesn’t: the failed element.
Electric: neither element glows: test both elements, then the thermostat.
Electric: completely dead: the thermal fuse or the power supply.
Either type: heats to the wrong temperature: the thermostat or temperature sensor.
Is It Worth Repairing?
Usually yes — oven repairs are cheaper than replacement in most cases.
Gas:
An igniter is $30 to $80 for the part, or $150 to $300 fitted.
A gas valve is $50 to $150 for the part, plus fitting by a licensed gas fitter.
A thermostat or sensor is $20 to $60.
Electric:
A heating element is $20 to $60 for the part, or $100 to $200 fitted.
A thermostat is $20 to $60.
A thermal fuse is $5 to $20.
A control board is $150 to $350.
Where the maths changes is a control board on an older oven, or a gas valve plus igniter on a budget oven. Against a new oven at $600 to $1,500, most single-component repairs are worth doing on any oven under 12 years old. On an oven over 15 years old with multiple faults, replacement may be the better call.
Safety Warning
Gas risk. If you smell gas, turn off the supply immediately, ventilate the area, and do not use the oven. Call a licensed gas fitter. Any repair involving the gas valve or gas line requires a licensed gas fitter — do not attempt gas work yourself.
Electrical risk. Ovens run on mains voltage and often on a dedicated high-current circuit. Switch off the breaker before removing any panel or testing any component.
Heat risk. The oven and elements stay hot long after use. Let the oven cool fully before working on it.
Element risk. Heating elements can crack or shatter. Handle them carefully and check for damage before fitting a replacement.
FAQ
Why is my oven not heating up?
On a gas oven, usually a weak igniter — it glows but doesn’t draw enough current to open the gas valve. On an electric oven, usually a failed heating element. The checks differ by oven type.
Why is my Whirlpool oven not heating?
The same fault paths apply across brands. On a Whirlpool gas oven, check the igniter first. On a Whirlpool electric oven, check the bake element first. Whirlpool ovens also commonly show a thermostat or sensor fault when the oven heats to the wrong temperature.
Why is my Frigidaire oven not heating?
Frigidaire gas ovens commonly fail at the igniter, and Frigidaire electric ovens at the bake element. Check the element glow or the igniter glow first — it’s the fastest way to narrow the fault.
Why is my Samsung oven not heating?
Samsung ovens often use a temperature sensor and control board that can produce a “not heating” fault without a failed element. If the element and thermostat test good, check the sensor and the board.
Why does my oven heat partially and then stop?
Usually a thermostat or thermal fuse fault, or a weak igniter on a gas oven. It can also be a control board issue.
Is it worth repairing an oven that’s not heating?
Usually yes. Most faults are a single $20 to $80 part. Only a control board on an older oven, or multiple faults on a very old oven, makes replacement the better call.
Get The Complete Diagnosis
Need to test each component and find the exact fault?
The complete diagnostic guide works through the heat path step by step — igniter, gas valve, and flame sensor on gas ovens; element, thermostat, thermal fuse, and control board on electric ovens — with expected readings and a repair-versus-replace framework.
The complete guide includes:
Full heat-path diagnosis for gas and electric ovens
Igniter testing and the weak-igniter diagnosis
Gas valve and flame sensor checks
Heating element testing with expected resistance
Thermostat and temperature sensor testing
Thermal fuse testing
Control board diagnosis
Brand-specific notes for Whirlpool, Frigidaire, Samsung, GE, Kenmore, Maytag, and LG
Repair-versus-replace framework for gas and electric models
Oven Not Heating Up Repair Guide
Complete diagnostic guide for ovens that won’t heat — gas and electric.
What’s included:
Gas and electric fault diagnosis
Igniter, gas valve, and flame sensor testing
Element, thermostat, and thermal fuse testing
Control board checks
Brand-specific notes
Repair-versus-replace guidance
Download instantly
$7.95
Gas Stove Igniter Clicking Constantly?
If the cooktop igniter won’t stop clicking, that’s a different fault — moisture or a stuck switch, not a heating issue.
Gas Stove Igniter Keeps Clicking When Off Repair Guide
Complete diagnostic guide for gas stove igniters that click continuously.
What’s included:
Moisture diagnosis and drying procedure
Switch and module testing
Wiring and electrode checks
Safety boundaries for gas work
Repair-or-replace guidance
Download instantly
$7.95
Looking for More Kitchen Appliance Guides?
Our guides cover microwaves, air fryers, kettles, toasters, and more.
Repair or Bin?
Before spending money on a repair, find out what is actually wrong with your appliance.
Repair or Bin gives you the information to diagnose the problem and make an informed repair-or-bin decision.
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