Completely no heat
The oven starts a cycle but the cavity stays cold and preheat never gets going.
Start here: Check settings and power first, then separate gas igniter trouble from electric bake element trouble.
Oven heating problem
LG Oven Not Heating
Direct answer: If your LG oven is not heating, start with the simple stuff: make sure it is in Bake, the timer is not holding it off, and the door is fully closed. After that, the most common failures are a weak oven igniter on gas models, a broken oven bake element on electric models, or an oven sensor that is reading wrong.
Most likely: Most of the time, the clue is the heating pattern. Gas ovens that click but never light usually point to the oven igniter. Electric ovens with a visibly split or blistered lower element usually need an oven bake element. An oven that heats a little but stays far off temperature can point to the oven sensor.
First separate gas from electric and full no-heat from weak heat. That keeps you from chasing the wrong part. Reality check: a lot of ovens that seem dead are actually stuck in the wrong mode or waiting on a delayed start. Common wrong move: replacing the oven sensor just because the temperature feels off without checking whether the oven is heating at all.
Don’t start with: Do not start by ordering an oven control board. Controls do fail, but they are not the first bet on a no-heat oven.
No glow or no flame on a gas oven?Watch the burner area through the bottom slots after starting Bake and listen for clicking.
No heat on an electric oven?Look for a cracked, blistered, or burned-through oven bake element before digging deeper.
Last reviewed: 2026-04-17
What kind of no-heat problem do you have?
Broil works but Bake does not
The upper burner or upper element works, but the oven will not heat normally on Bake.
Start here: That usually points to the oven bake side first, especially the oven igniter on gas models or the oven bake element on electric models.
Heats weakly or very slowly
The oven warms a little, but it takes far too long or never reaches the set temperature.
Start here: Look for a weak gas oven igniter, a partially failed oven bake element, or an oven sensor reading off.
Display looks normal but no cooking heat
The control panel responds and the light may work, but the oven does not actually produce heat.
Start here: Treat that as a heating-component problem before blaming the control unless the unit also shows erratic controls or relay chatter.
Most likely causes
1. Wrong mode, delayed start, or timer setting
The display can look normal while the oven is still waiting for a timed cycle or sitting in a non-heating mode.
Quick check: Cancel the cycle, clear the timer, choose Bake, set a temperature, and listen or watch for heat within a minute or two.
2. Weak or failed oven igniter on a gas oven
This is the classic gas-oven no-heat problem. You may hear clicking or smell a little gas, but the burner never lights, or it lights late and weak.
Quick check: Start Bake and watch for a strong glow at the igniter. If it glows but the burner does not light promptly, the igniter is still suspect.
3. Failed oven bake element on an electric oven
When the lower element is split, blistered, or burned open, the oven may stay cold or only get partial heat from the broil side.
Quick check: With power off and the oven cool, inspect the oven bake element for cracks, bubbles, or a burned spot.
4. Out-of-range oven sensor
If the oven heats some but runs far cooler than the set temperature, the sensor can misread cavity temperature and shut heat down too early.
Quick check: Compare actual temperature with the set temperature after preheating and look for a consistent large offset, not just one bad cycle.
Step-by-step fix
Step 1: Reset the cycle and confirm the oven is actually being asked to heat
A surprising number of no-heat calls turn out to be a timer, delayed start, Sabbath-style hold, or wrong cooking mode issue.
- Cancel anything currently running.
- Clear the timer if it is active.
- Select Bake, not Warm, Proof, Delay Start, or a cleaning mode.
- Set a normal cooking temperature like 350°F.
- Make sure the door is fully closed and latched normally.
- Wait 1 to 2 minutes and listen for signs of heating: relay clicks, igniter glow, burner ignition, or element warming.
Next move: If the oven starts heating normally now, the problem was a setting or cycle issue. Use it through a full preheat to make sure it stays stable. If the display acts normal but there is still no real heat, move on to the heating hardware checks.
What to conclude: You have ruled out the easy control-setting mistakes before opening anything up.
Stop if:
- You smell strong gas that does not clear quickly.
- The display is dead, flickering badly, or the breaker trips.
- The door will not unlatch or the oven is stuck in a cleaning cycle.
Step 2: Separate gas-oven symptoms from electric-oven symptoms
Gas and electric ovens fail in different ways. Getting this split right saves time and keeps you from buying the wrong part.
- If your oven uses gas for baking, start Bake and watch through the lower openings or under the oven bottom if visible.
- Look for an igniter glow and listen for the burner to light within a short time after the igniter gets bright.
- If your oven is electric, look at the lower oven bake element after starting Bake. It should begin heating, though it may not glow bright red right away at every point in the cycle.
- If Broil works but Bake does not, note that clearly. That is a strong clue toward the bake-side component, not the whole oven.
Next move: If you clearly identify gas igniter behavior or a dead electric bake element, you have a solid direction for the repair. If you cannot tell what is happening, shut power off before any closer inspection and continue with a visual check.
What to conclude: A gas oven that glows but will not light usually points to the oven igniter. An electric oven with a dead lower element usually points to the oven bake element.
Step 3: Inspect the most likely heating part for obvious failure
Visible damage gives you the cleanest answer and keeps you from guessing at sensors or controls too early.
- Turn the oven off at the control and shut off power at the breaker.
- For an electric oven, inspect the oven bake element closely for splits, blisters, pitting, or a section burned through.
- For a gas oven, inspect the oven igniter area for cracks in the igniter body, damaged wires, or heavy white chalky wear.
- Check the oven cavity for anything blocking the burner flame path or touching the bake element.
- Look at the oven door gasket. A badly torn gasket usually will not cause total no-heat, but it can make a weak-heating complaint worse.
Next move: If you find a damaged oven bake element or a clearly deteriorated oven igniter, that is the part to replace first. If nothing looks damaged, keep going. Many igniters and sensors fail without obvious visual damage.
Step 4: Check the temperature-sensing side if the oven heats weakly or never reaches set temperature
If the oven does produce some heat, the next best suspect is the part telling the control how hot the cavity is.
- Run the oven on Bake and note whether it gets warm at all or stays completely cold.
- If it heats some but stays well below the set temperature, focus on the oven sensor before assuming a control problem.
- With power off, inspect the oven sensor inside the cavity for looseness, damage, or a connector that looks heat-stressed if accessible.
- Pay attention to pattern: consistent underheating points more toward the oven sensor, while no heat at all points more toward the igniter or bake element.
Next move: If the oven has a steady, repeatable temperature miss rather than total no-heat, the oven sensor becomes a supported repair path. If the oven is fully dead on Bake and you have no clear igniter or element action, the diagnosis is no longer a simple homeowner parts guess.
Step 5: Replace the confirmed heating part or stop before chasing the control
By this point you should have a supported part path or a clear reason to bring in a pro instead of throwing parts at it.
- Replace the oven igniter if you have a gas oven with a glowing igniter that will not light the burner promptly or reliably.
- Replace the oven bake element if you have an electric oven with a visibly damaged or non-heating lower element.
- Replace the oven sensor if the oven heats but stays consistently far off temperature and the sensor branch fits better than a no-heat branch.
- After reassembly, restore power, run Bake at 350°F, and watch for normal preheat behavior.
- If none of those branches fit, stop before ordering an oven control. At that point, a wiring issue, relay failure, or supply problem needs a more exact diagnosis.
A good result: If the oven reaches temperature normally and cycles heat on and off without long stalls, the repair path was right.
If not: If the new part does not change the symptom, do not keep stacking parts. The next step is a professional diagnosis of wiring, control output, or supply issues.
What to conclude: The main homeowner-fix paths here are the oven igniter, oven bake element, and oven sensor. Beyond that, the risk of misdiagnosis goes up fast.
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FAQ
Why does my LG oven say it is on but not heat?
Usually the control is working but the heating side is not. The most common reasons are the oven being in the wrong mode, a weak gas oven igniter, a failed electric oven bake element, or an oven sensor issue on a weak-heating complaint.
How do I know if my oven igniter is bad?
On a gas oven, a bad oven igniter often glows but does not get hot enough to open the gas valve properly. You may see glow with no flame, delayed flame, or very slow preheat. Glow alone does not prove the igniter is good.
Can an oven bake element fail without looking broken?
Yes. Many oven bake elements show obvious splits or blisters, but some fail internally with little visible damage. If Bake does not heat and Broil still works on an electric oven, the oven bake element is still a strong suspect.
Does a bad oven sensor cause no heat or just wrong temperature?
Most of the time, the oven sensor causes temperature problems, not a completely dead oven. If the oven stays totally cold, look harder at the oven igniter on gas models or the oven bake element on electric models before blaming the sensor.
Should I replace the oven control board if the oven is not heating?
Not first. Controls are farther down the list than settings, power, the oven igniter, the oven bake element, and the oven sensor. If those checks do not fit and you would need live testing to confirm control output, that is usually a pro call.