Oven Not Heating: Bake Element vs. Temperature Sensor – How to Tell Which One’s Bad

You set the dial to 350°F, wait twenty minutes, and open the door to find your cookies spreading into one flat disc. Or your roast comes out medium-rare when you asked for well done. The oven is running, the burner glows, but the temperature inside just isn’t matching what the control panel says.

That’s a frustrating problem, but it’s also one of the most common calls we get here at S&W Service & Repair LLC. And here’s the thing: you don’t need to be a technician to narrow down the cause. In the next ten to fifteen minutes, you can check a few things safely and figure out whether you’re dealing with a dead bake element or a faulty temperature sensor. Sometimes it’s neither. But you won’t know until you look.

Before you do anything, unplug the oven or flip the breaker. Electric ovens run on 240 volts. That’s not a shock you walk away from. We’ll say that once and mean it.

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Quick Verdict: What’s Most Likely Wrong

If your oven is running cold but the burner glows, the sensor is the usual suspect. If the burner barely glows or has visible blisters, it’s the element. Here’s the fast breakdown:

| Symptom | Likely Culprit | DIY Difficulty | Part Cost | Pro Repair Cost | |———|—————|—————-|———–|—————-| | Oven heats slowly, never reaches temp | Weak bake element | Moderate | $25–$60 | $150–$250 | | Oven heats unevenly, cold spots | Failing bake element | Moderate | $25–$60 | $150–$250 | | Oven runs 20–50°F low consistently | Temperature sensor drifting | Easy | $20–$40 | $120–$200 | | Oven cuts out mid-cycle, then resumes | Door switch failing | Moderate | $15–$30 | $130–$220 | | No heat at all, no glow | Control board or relay | Hard | $200–$400 | $350–$550 | | Error code F3 or F5 on display | Sensor shorted or open | Easy | $20–$40 | $120–$200 |

If your symptom matches the top two rows, skip ahead to the bake element check. If it matches the third row, go straight to the sensor test. Either way, read the safety note above one more time before you touch anything.

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Step 1: Check the Bake Element Visually

Open the oven door and look at the element on the bottom. That’s the bake element. You’re looking for blisters, bubbles, or a visible break in the metal tube. If the element looks like it has a blister or a crack, it’s dead. When an element fails, it often does so in a way that leaves part of the circuit open. That means the element might still heat up, but not fully. You’ll get uneven heating or a longer preheat time.

Here’s what a failing bake element looks like up close:

If the element looks fine but the oven is still cold, move to the next check.

Where to Find the Bake Element

The bake element is the one at the bottom of the oven cavity. It’s usually held in by two screws, one at each end. You don’t need to remove it to inspect it—just look at the surface. If you see any raised bubbles or a gap in the metal tube, that’s your problem.

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Step 2: Run a Self-Test or Calibration Check

Most modern ovens have a calibration function. It’s usually in the settings menu. You can adjust the temperature offset by up to 35°F in either direction. If your oven is running 25°F low, you might just need to bump the offset. That’s a free fix. But here’s the catch: if the oven is running 50°F or more off, calibration won’t save you. That’s a sign of a hardware problem, not a setting issue.

How to Access Calibration Mode

Check your manual or look for a “Settings” or “Options” button on the control panel. From there, you’re looking for “Calibration” or “Temp Offset.” Adjust in 5°F increments and test with an oven thermometer after each change. If you’re still more than 50°F off after maxing the offset, stop fiddling and move to the sensor test.

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Step 3: Check the Oven Sensor Resistance

The oven sensor is a small probe that sticks into the back wall of the oven cavity. It’s usually about the size of a matchstick. That probe tells the control board what the temperature actually is. If the sensor is out of spec, the board gets bad information and heats accordingly.

To check it, you need a multimeter. Set it to ohms. At room temperature, a working sensor should read around 1,090 ohms. If you see a reading of zero or an open line, the sensor is shorted or broken. If you see something wildly different, like 2,000 ohms, the sensor is drifting. Both mean replacement.

Here’s where the sensor lives and how to test it:

Where to Find the Sensor

The sensor probe is at the back of the oven cavity, usually on the upper-left or upper-right wall. It’s a small metal rod about the size of a matchstick, connected to a wire that runs through the back wall to the control board. To test it, you’ll need to access the wire connection—either from the back panel or through the control panel, depending on your model.

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Step 4: Look at the Control Board Display

Some ovens have a diagnostic mode. You can usually trigger it by pressing a specific sequence of buttons. Check your manual. If the display shows an error code like F3 or F5, that points to a sensor issue. If it shows a code related to the element or relay, that’s a different animal. Don’t guess on codes. Write them down and look them up. But if you see a code, you’re already past the simple stuff.

Common Error Codes and What They Mean

| Error Code | Meaning | Part Needed | DIY vs. Pro | |————|———|————-|————-| | F3 | Sensor open circuit | Temperature sensor ($20–$40) | DIY if comfortable with multimeter | | F5 | Sensor shorted | Temperature sensor ($20–$40) | DIY if comfortable with multimeter | | F9 or F0 | Control board failure | Control board ($200–$400) | Pro recommended | | E0 or E1 | Keypad or wiring issue | Control panel or harness | Pro recommended | | F2 | Oven too hot (sensor or relay stuck) | Sensor or board | Pro recommended |

If you see a code that doesn’t match the table, write it down and call us. We can look it up and tell you what part to order or whether it’s worth a service call.

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Step 5: Listen for the Relay Click

Turn the oven on to bake. Wait a minute or two. You should hear a distinct click from the control board when the relay closes and sends power to the element. If you hear the click but the element never glows, you’ve got a bad element or a broken wire. If you don’t hear the click at all, the board isn’t sending power, which points to the sensor or the board itself.

Here’s the relay location on a typical control board:

Where to Find the Control Board

The control board is usually behind the control panel on top of the oven, or behind a rear access panel. You’ll need a screwdriver to get to it. Don’t touch any capacitors—they can hold a charge even after the oven is unplugged. If you’re not comfortable poking around in there, that’s a good stopping point.

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What These Checks Actually Tell You

The bake element and the sensor work together. The sensor reads the temperature. The board compares that reading to your set point. If the sensor is off, the board thinks the oven is hotter than it is, so it cuts power early. You get a cold oven. If the element is weak, it can’t deliver enough heat to reach the set point in a reasonable time. You get a slow oven that might eventually hit temp but takes forever.

The door switch is another player. If the switch is worn, the oven might think the door is open and cut power to the bake element as a safety measure. That’s a common failure on older models. You can test that with a multimeter too, but it’s a bit more involved.

Here’s where the door switch is and how to test it:

Where to Find the Door Switch

The door switch is located near the top or side of the oven opening, where the door latch meets the frame. You’ll see a small plunger that gets pressed when the door closes. Use a multimeter to check for continuity when the switch is pressed and released. If it doesn’t click or read correctly, that’s your culprit.

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When to Stop and Call a Tech

Here’s where we get honest. If you’ve done the visual check, tested the sensor, and confirmed the element looks good, you’re probably dealing with a control board issue. That’s not a DIY job. Replacing a control board on a modern oven often requires reprogramming, and if you buy the wrong part, you’re out $200–$400 with nothing fixed. That’s the cost-of-mistake reason to stop right there.

Also, if you opened the oven and saw visible sparks, scorch marks, or a burning smell, don’t touch anything. Shut the breaker off and call for service. A shorted element can damage the board if you keep running it.

And if your oven is a slide-in model with a lot of wiring underneath, don’t pull it out unless you’re comfortable disconnecting the gas line or the hardwired power. That’s a mistake that can cost you a service call plus a new floor if you drop it.

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Why This Matters in North Texas

We work on ovens in Denton, Little Elm, Frisco, and Lewisville every week. The heat here is hard on appliances, but ovens fail for the same reasons everywhere. The difference is that when your oven is down in the summer, you’re not just missing cookies—you’re stuck with takeout or a grill that’s too hot to stand next to. Getting it fixed right the first time matters.

We’ve got a solid track record in the area. Our Google reviews in Denton County consistently mention fast turnaround and honest diagnoses. We’re licensed and insured in Texas, and we back our work with a 90-day parts and labor warranty. If the same issue comes back within that window, we return and fix it at no charge. We also offer same-day appointments for calls placed before noon, Monday through Saturday, in most of our service area.

At S&W Service & Repair LLC, we handle all the major brands: Whirlpool, Maytag, GE, LG, Samsung, KitchenAid, Frigidaire, Bosch, Kenmore, and the high-end stuff like Sub-Zero, Wolf, and Viking. We also work directly with Old Republic Home Protection warranty claims, so if you’ve got an ORHP policy, you don’t have to fight the insurance company yourself. We handle the paperwork and the repair.

If you’ve done the checks above and you’re still not confident, that’s fine. You’ve already saved yourself time by narrowing it down. When you call, tell us what you found. It helps us bring the right parts on the first truck roll. That means fewer trips and a faster fix for you.

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Related Oven Repairs

If you’re dealing with a different oven issue, we’ve got practical guides for those too:

• Oven Not Heating at All: Complete Troubleshooting Guide
• Oven Temperature Sensor Replacement: Step-by-Step
• Bake Element vs. Broil Element: What’s the Difference?
• Oven Door Won’t Close Properly: Fixes and Costs

For other appliance issues, you can browse our washer repair section—same kind of practical advice, no fluff.

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Frequently Asked Questions

How do I know if my oven sensor is bad?

You can test it with a multimeter. At room temperature, a working sensor reads around 1,090 ohms. If you get zero, an open line, or a reading far off from that, the sensor is bad.

Can a bad bake element cause the oven to run cold?

Yes. A weak element can’t deliver enough heat to reach the set point in a reasonable time. You’ll notice longer preheat times and uneven baking.

Is it worth replacing an oven control board myself?

Usually not. Control boards often need reprogramming after installation, and buying the wrong part is a common mistake. If you’ve ruled out the element and sensor, it’s worth a service call.

How much does it cost to fix an oven that’s not heating?

It depends on the part. A sensor replacement runs $120–$200 with labor. A bake element runs $150–$250. A control board runs $350–$550. We’ll give you a flat quote before we start any work.

Do you offer same-day oven repair in North Texas?

Yes. If you call before noon, we can usually get to you the same day in Denton, Little Elm, Frisco, Lewisville, and most of Denton County. Call 817-403-2174 to check availability.

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The Bottom Line

An oven that’s running cold is rarely a mystery. Check the element. Check the sensor. Check the door switch. If those all pass, it’s the board. Don’t throw parts at it. Call someone who does this every day.

We’re S&W Service & Repair LLC, and we’ve been keeping North Texas kitchens cooking for years. If you’re in Denton, Little Elm, Oak Point, Frisco, Lewisville, Highland Village, Flower Mound, The Colony, Krum, Crossroads, or Plano, we can get to you fast.

Call us at 817-403-2174 or book your repair online at sandwserviceandrepaircompanyllc.setmore.com. We’ll get your oven back to the right temperature.