Oven Not Heating: Bake Element, Igniter & Thermostat Diagnostic Guide for All Brands

If your oven won’t heat, the problem almost always starts with one of three parts: the bake element (electric ovens), the igniter (gas ovens), or the thermostat/sensor (both types). This guide gives you the order of checks, the testing methods, and the decision points that tell you whether to fix it yourself or call a pro.

Gas vs Electric: The First Decision Criterion

The diagnostic path flips depending on your fuel type. In an electric oven, the bake element carries high voltage and either works or doesn’t — visible damage (cracks, blisters) is the quickest clue. In a gas oven, the igniter is the weak link. A weakening igniter may glow orange but fail to draw enough current to open the gas valve, so the oven never lights.

Trade-off analysis: An electric bake element is simpler to test (just continuity), but a bad igniter requires checking amperage, and the test is more model-specific. If you have a gas range made after 2010, the igniter is the leading candidate in about 70% of no-heat calls, based on service data from major brands. This single distinction — gas vs. electric — changes your first action and the odds of which part is faulty.

Oven type	Symptom	Most likely part	Quick test
Electric	No heat at all	Bake element	Visual check for cracks; multimeter continuity
Electric	Heats slowly or unevenly	Thermostat sensor	Resistance test at room temp
Gas	Glowing igniter but no flame	Igniter	Amperage draw (needs > 2.8 A typical)
Gas	No glow at all	Igniter or gas valve	Continuity check first, then amperage

Early Safety Checks

Before you open the oven or touch any wiring, run through this checklist. Each item takes under a minute and can save you from unnecessary disassembly or a dangerous misdiagnosis.

• [ ] Circuit breaker and outlet – Check that the breaker hasn’t tripped and the outlet (if plug-in) isn’t loose. For gas ovens, confirm the gas shut‑off valve is open.
• [ ] Oven clock and timer – If the oven uses a timed bake setting, the timer must be set correctly. A digital display showing “888” or a blank screen may indicate a control board issue, not the element.
• [ ] Oven temperature setting – Sounds trivial, but a thermostat that drifts 50°F cold can prevent the oven from reaching the set temperature. Set it to 350°F and wait 10 minutes.
• [ ] Error codes – Consult your owner’s manual or look for a flashing code on the display. Many Whirlpool and GE models will show an “F” code (e.g., F3, F5) that points to the sensor or control board.
• [ ] Visual inspection of the bake element – Look for cracks, burn spots, or separations in the metal sheath. If you see any, replace the element before testing further.

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Diagnosing the Bake Element (Electric Ovens)

The bake element is a thick metal coil at the bottom of the oven cavity. It emerges from the back wall and sits just above the oven floor.

How It Fails

The metal sheath corrodes over time, or the internal resistance wire breaks. A visible crack or burned spot is a 100% diagnosis – replace it. If it looks fine, you need a multimeter.

Testing Procedure

1. Unplug the oven or turn off the breaker.

2. Remove the element (usually two screws at the back wall; pull it out gently).

3. Set your multimeter to ohms (Ω). Touch one probe to each terminal.

• Good reading: 10–50 ohms (varies by model; check your manual).
• Open (infinite): Replace the element.
• Short (0 ohms): Replace the element.

4. Also check between each terminal and the metal sheath. You want infinite resistance (no continuity). Any reading here means the element has shorted to ground – immediate replacement.

Evidence in practice: On a typical Whirlpool electric range, a working bake element measures about 23 ohms. A failed element shows “OL” on the multimeter. If you get a reading that falls within the expected range but the oven still doesn’t heat, the problem may be the control board or the thermostat sensor.

Confirm the Fix Worked

After installing a new element, run a 350°F bake cycle for 15 minutes. Use an oven-safe thermometer placed on the center rack. The thermometer should read within 25°F of the set temperature after 10 minutes, and the element should glow a uniform orange-red. If the oven still fails to heat, recheck the wiring harness for a loose connection at the terminal block.

For a deeper look at failure patterns, see our guide on troubleshooting common oven heating element problems. When replacement is needed, a quality bake element for Maytag or Whirlpool ranges is the MER8674AW0 bake element, engineered for even heat distribution.

Diagnosing the Igniter (Gas Ovens)

A gas oven’s igniter does two jobs: it gets red‑hot (usually within 30–60 seconds) and it draws electrical current to open the gas safety valve. When the igniter weakens, it still glows but draws too little current to release the gas.

Testing Approach

Measure amperage, not just continuity. A glowing igniter can still be bad.

1. Disconnect power and remove the igniter from the oven floor or burner box (typically two screws and a wire connector).

2. Set your multimeter to DC amps (or use a clamp meter). Connect the meter in series with the hot wire.

3. Reconnect power and press Bake. The igniter should glow and the amperage draw should climb.

• Typical threshold: 3.2–3.6 amps. If it stays below 2.8 amps after 90 seconds, the igniter is weak and must be replaced.
• Note: Some newer igniters (especially on Samsung and LG models) require 2.5–3.0 amps minimum. Check your service manual.

Common confusion: If you test resistance instead of amperage, you’ll see a low reading (40–100 ohms) even on a bad igniter. Resistance alone does not tell you whether the igniter can open the valve. Amperage is the reliable test.

Confirm the Fix Worked

After replacing the igniter, press Bake and watch for a steady flame within 60 seconds. The igniter should stay orange‑red during the entire cycle. If the oven lights but goes out after 30 seconds, the gas valve may be failing or the igniter still draws borderline amperage – remeasure to confirm.

Thermostat and Sensor Failures

The oven thermostat (often called the oven temperature sensor) is a small probe protruding into the oven cavity. It changes resistance with temperature. If it drifts out of spec, the oven may not reach the set temperature, or it may shut off the heating element prematurely.

How It Fails

The sensor can short to the oven chassis, or its resistance curve can shift so far that the control board thinks the oven is already hot. Another real-world failure mode: the connector at the back of the oven becomes corroded enough to cause an open circuit, even though the sensor itself tests fine when removed.

Testing

1. Remove the sensor (usually one or two screws at the back wall).

2. Measure resistance at room temperature (about 70°F). Most sensors read between 1,000 and 1,200 ohms at 70°F.

3. Heat the sensor with a hair dryer (don’t apply direct flame). Resistance should drop steadily.

• A sensor that stays at the same resistance is frozen and needs replacement.
• A sensor that shows “OL” (open) or 0 (short) is bad.

Brand-specific note: GE ovens often use a sensor that reads 1,080 ohms ± 1% at room temperature. If your oven is a GE and the sensor measures 1,200 ohms or higher, the control board may interpret that as a too‑hot environment and refuse to heat. For Whirlpool models, a sensor reading above 1,150 ohms at room temperature often triggers the same behavior.

Confirm the Fix Worked

After replacing the sensor, set the oven to 350°F and let it run for 15 minutes. Place an oven thermometer on the center rack. The actual temperature should stabilize within 25°F of the set temperature. If the oven overshoots by more than 50°F or cycles off too early, the new sensor may be mismatched to your control board (rare with OEM parts) or the board itself needs recalibration.

For step‑by‑step instructions on accessing and testing these parts, see our simple steps to check oven heating element guide.

When to Call a Pro

Some signs mean you should stop testing and schedule a service call:

• Burning or gas smell – If you smell gas (rotten‑egg odor), leave the room, open a window, and call the gas company. Do not test the oven.
• Sparks or visible arcing – If you see sparks while the oven is on, shut off the breaker and call an appliance repair professional.
• Error codes that won’t clear – Codes like F2 (oven too hot) or F7 (keypad short) often point to a control board failure, not a simple element or sensor issue.
• Multimeter shows everything normal – If the element, igniter, and sensor all test in spec but the oven still doesn’t heat, the control board is the likely culprit. Replacing a control board requires programming and model‑specific harnesses – best left to a pro.

Frequently Asked Questions

Q: Can a bad thermostat cause the oven not to heat at all?

Yes, but it’s less common than a failed element or igniter. If the sensor is shorted or reads above 1,200 ohms at room temperature, the control board may keep the heating circuit off. A visual check for corrosion on the sensor connector is worth doing before assuming the board is bad.

Q: How do I know if the igniter is bad if it still glows?

Measure the amperage draw. A glowing igniter that draws less than 2.8 amps (for most standard gas ovens) cannot open the gas valve. Replace the igniter. If you don’t have a clamp meter, a quick proxy: count how many seconds it takes to glow bright orange — if it takes more than 90 seconds, it’s likely weak.

Q: Should I replace both the bake and broil elements at the same time?

Only if both show signs of failure or if one element is burned through and the other is from the same installation period. Otherwise, replace only the faulty one. The broil element often lasts longer because it’s used less. However, if both are more than 10 years old, you can pre‑emptively replace them together to avoid a repeat failure next month.

Q: What if my oven heats unevenly but reaches temperature?

That usually points to a failing thermostat sensor or a defective bake element (uneven resistance along its length). Test the sensor resistance at room temperature and check the element for hot spots with a thermal imager or by visual inspection. Also make sure the bake element isn’t touching the oven floor — a sagging element that touches metal will short out and heat unevenly.