Key Info

Introduction

An oven not heating up can put a wrench in the works of your cooking. The thing about this particular problem is that it often surfaces as an unpleasant surprise.

One day, the oven will be working fine. Next, it won’t heat up, and the cookie tray or bread pan that you put inside will basically get a lukewarm storage treatment instead of getting baked.

Imagine if you have guests over. Sheesh.

Anyway, while it can be alarming, it’s not very troublesome to fix. At most, you’ll have to call in a professional to take care of it for you. But before you do that, there are various DIY measures that you can try.

In this guide, we’re going to tell you about the main causes of an oven not heating up, as well as what to do to fix each of them. 

Common Causes of an Oven Not Heating

1. A Burned-Out Bake Element (Electric Ovens)

The bake element is the coil at the bottom of an electric oven, and it’s the most frequent reason for heating failure. Over time, it can wear out, crack, or develop a visible blister where it’s burned through.

How to check it: Turn the oven on and watch the element. If it doesn’t glow red within a few minutes, or if you spot a crack, blister, or visible break, that’s your answer. You can also pull the element and test it with a multimeter for continuity. No reading means it’s dead.

How to fix it:

1. Unplug the oven or shut off power at the breaker.
2. Remove the mounting screws holding the element in place.
3. Pull the element forward and disconnect the wire terminals.
4. Connect the new element, matching it to your exact model number.
5. Reattach the mounting screws and restore power.
6. Run a test heat cycle to confirm it’s glowing properly.

This is one of the more approachable DIY fixes on this list.

2. A Faulty Igniter (Gas Ovens)

In gas ovens, the igniter does two jobs: it lights the gas, and it opens the safety valve that lets gas flow to the burner. If the igniter is weak, it might glow but never get hot enough to trigger the valve, which means gas never reaches the burner.

How to check it: Watch the igniter when you turn the oven on. If it glows but takes longer than 90 seconds to ignite the flame or doesn’t ignite at all, it’s likely failing. A multimeter test against the manufacturer’s amperage specs will confirm it.

How to fix it:

1. Shut off the gas supply and unplug the oven.
2. Remove the oven floor panel or back panel to access the igniter.
3. Disconnect the wire harness from the old igniter.
4. Remove the mounting screws and pull the igniter out.
5. Install the new igniter, matching the exact part number for your model.
6. Reconnect the wire harness and reassemble the panel.
7. Restore gas and power, then test a heating cycle.

3. A Broken Thermostat or Temperature Sensor

The thermostat (or sensor, in newer ovens) tells the control board what the internal temperature is. If it’s giving a false reading, the oven might think it’s already hot and never kick the heating element on.

How to check it: Look for the sensor probe, usually a small metal rod near the back wall of the oven cavity. If it’s touching the oven wall or is visibly damaged, that’s likely the issue. You can also test resistance with a multimeter and compare it to the manufacturer’s chart, since resistance should change predictably as temperature rises.

How to fix it:

1. If the sensor is simply touching the oven wall, gently bend it back into the correct position and retest.
2. If it’s faulty, unplug the oven first.
3. Unscrew the sensor’s mounting plate at the back of the oven cavity.
4. Disconnect the wiring from the old sensor.
5. Install a replacement sensor that matches your model.
6. Reattach the mounting plate and restore power.

4. A Tripped Circuit Breaker or Loose Wiring

Sometimes the problem isn’t inside the oven at all. A partially tripped breaker can allow the oven’s display and lights to work while cutting power to the heating circuit specifically.

How to check it: Head to your breaker panel and look for any switch that’s not fully in either the “on” or “off” position. Reset it by switching it fully off, then back on. The U.S. Consumer Product Safety Commission also recommends stopping use of electrical appliances that repeatedly trip breakers until the underlying issue is repaired. It’s also worth checking the power cord and outlet for any visible damage or looseness.

How to fix it:

1. Locate your home’s breaker panel.
2. Switch the affected breaker fully to the “off” position.
3. Wait a few seconds, then switch it back to “on.”
4. Test the oven to see if heating resumes.
5. If it trips again right away, stop resetting it and call an electrician, since that points to a deeper wiring issue.

5. A Failing Control Board

The control board is the brain of the oven, sending signals to the heating elements, igniter, and sensors. When it fails, the oven might turn on and seem to function normally while never actually heating.

How to check it: This is the toughest cause to diagnose at home, since the symptoms can mimic other problems. If you’ve ruled out the element, igniter, thermostat, and power supply, and the oven still won’t heat, the control board is the next suspect.

How to fix it:

1. Rule out the bake element, igniter, sensor, and power supply first.
2. Get a second opinion or have a technician confirm the diagnosis, since boards are pricey and typically non-returnable once installed.
3. Unplug the oven and locate the control board, usually behind the control panel.
4. Disconnect the wiring harness and remove the mounting screws.
5. Install the new board and reconnect the wiring.
6. Restore power and run a test cycle.

When to Call a Professional

If you’ve worked through these steps and the oven still isn’t heating, or if the fix involves gas line work, it’s time to contact a professional appliance repair technician. Gas connections in particular aren’t worth troubleshooting solo if you’re not confident, since a small mistake there carries real safety risk.

Quick Reference: Causes and Fixes

The Bottom Line

Most cases of an oven not heating come down to a worn-out bake element, a failing igniter, or a sensor reading that’s thrown off the whole system. Working through each cause in order, starting with the simplest and cheapest checks first, will save you both time and money before you commit to a part purchase or a service call.