oven

Oven Not heating to correct temperature

If your oven is not reaching the correct temperature, the most common causes are a faulty temperature sensor, a worn-out heating element, or a thermostat that needs calibration. This guide walks you through diagnosing and fixing the issue safely, starting with the simplest solutions before moving to part replacement.

1. 1

   Unplug the Oven and Ensure Safety

   Before doing anything else, disconnect the oven from its power source. For an electric oven, unplug it from the wall outlet or flip the dedicated circuit breaker in your electrical panel to the OFF position. For a gas oven, turn the gas supply valve to the OFF position in addition to cutting electrical power. Wait at least 10 minutes for any residual heat inside the oven to dissipate before you begin working.

   warning

   Never work on a plugged-in or gas-connected oven. Failure to disconnect power and gas can result in serious injury or death.

   tip

   Place a piece of tape over the circuit breaker or gas valve so no one accidentally turns it back on while you are working.

2. 2

   Verify the Problem With an Oven Thermometer

   Place an inexpensive oven thermometer on the center rack of the oven. Set the oven to 350°F (175°C) and allow it to fully preheat — this usually takes 15 to 20 minutes. Once the oven signals it has finished preheating, check the thermometer reading. Check again at 5-minute intervals for about 15 more minutes to account for temperature cycling. If the thermometer consistently reads more than 25°F (14°C) above or below 350°F, you have confirmed the temperature problem and can move forward with diagnosis.

   tip

   Take multiple readings and average them — ovens naturally cycle heat up and down by about 25°F during normal operation. A single reading is not enough to confirm a problem.

   tip

   Oven thermometers are inexpensive and available at most grocery or hardware stores. Do not skip this step; it confirms the problem before you spend money on parts.

3. 3

   Recalibrate the Oven Thermostat

   Many ovens allow you to adjust the built-in thermostat calibration without replacing any parts. Check your owner's manual for the calibration procedure specific to your model. On most ovens, you access this setting through the control panel by holding down the 'Bake' button for several seconds until a calibration menu appears. You can then use the arrow buttons to offset the temperature in increments (usually 5°F or 10°F at a time) up to a maximum of 35°F in either direction. Save the setting and run the oven thermometer test again from Step 2 to verify the change worked.

   tip

   Your owner's manual is the best resource for calibration steps. If you no longer have it, search for your model number on the manufacturer's website — most manuals are available as free PDF downloads.

   tip

   If the oven is off by more than 35°F, calibration alone will not fix the problem. Move on to inspecting the temperature sensor and heating elements.

4. 4

   Inspect the Temperature Sensor (Oven Probe)

   The temperature sensor is a thin metal probe, usually about 2 inches long, located on the interior back wall of the oven near the top. With the oven unplugged, visually inspect the sensor for obvious damage such as burns, cracks, or a bent tip. Next, use a multimeter set to the resistance (Ohms) setting. Disconnect the sensor's wiring connector — you may need to remove one or two screws to pull it away from the oven wall enough to access the connector. Test resistance across the sensor's two terminals. At room temperature (around 70°F / 21°C), most oven temperature sensors should read approximately 1,080 to 1,100 Ohms. Consult your model's service manual for the exact specification. A reading significantly outside this range means the sensor is faulty and needs to be replaced.

   warning

   Confirm the oven is fully unplugged before touching any internal wiring or connectors.

   tip

   A multimeter is an inexpensive tool available at hardware stores. If you do not own one, this is a worthwhile investment for many future home repairs.

   part

   Replacement temperature sensors are model-specific. Have your oven's model number ready when ordering — it is typically located on a label inside the door frame.

5. 5

   Replace the Temperature Sensor if Faulty

   If the sensor tested outside the acceptable resistance range, replace it. With the oven still unplugged, remove the one or two screws holding the sensor bracket to the back wall of the oven interior. Gently pull the sensor forward to expose more of the attached wire. Disconnect the wiring harness connector — it typically snaps apart by hand. Connect the new sensor to the wiring harness, push the wire back into the hole in the oven wall, and secure the bracket with the screws. Reconnect power and run the oven thermometer test from Step 2 to verify the repair.

   tip

   Take a photo of the wiring connection before you disconnect it so you have a reference when connecting the new sensor.

   warning

   Do not force or kink the wire inside the oven wall — damaged wiring is a fire hazard.

6. 6

   Inspect the Bake and Broil Heating Elements (Electric Ovens Only)

   For electric ovens, a partially failed heating element can cause uneven or insufficient heat. With the oven unplugged, visually inspect both the bake element (located at the bottom of the oven) and the broil element (located at the top). Look for visible damage such as holes, blisters, burn marks, or broken sections. A healthy element should look uniform and intact. You can also test each element with a multimeter set to resistance (Ohms): disconnect one wire from the element terminal, place one probe on each terminal, and check the reading. A working element typically reads between 10 and 50 Ohms depending on the model. An open reading (OL or infinity) means the element has failed and must be replaced.

   warning

   Heating elements can have sharp, broken edges if damaged. Wear work gloves when handling them.

   tip

   Even if only one element shows obvious damage, test both while you have the oven open — it saves time if the second element is also failing.

7. 7

   Replace a Faulty Heating Element (Electric Ovens Only)

   With the oven unplugged, remove the screws securing the faulty element's mounting bracket to the oven floor or ceiling. Gently pull the element forward to expose the wire terminals at the back. Use a nut driver or screwdriver to disconnect the wires from the terminals — note which wire connects to which terminal, or take a photo for reference. Connect the replacement element to the wires, slide it into position, and secure the mounting screws. Restore power and run the oven thermometer test from Step 2 to confirm the repair was successful.

   warning

   Make absolutely sure the oven is unplugged before touching the element terminals — the wires behind the element carry full household voltage.

   part

   Heating elements are model-specific. Use your oven's full model number to order the correct replacement part from the manufacturer or a reputable appliance parts supplier.

8. 8

   Check the Oven Igniter (Gas Ovens Only)

   For gas ovens that are not reaching the correct temperature, a weak igniter is a common culprit. The igniter must reach a high enough temperature to open the gas safety valve — if the igniter is weak, the valve may only open partially, restricting gas flow and reducing heat output. With the oven completely powered off and the gas supply shut off, locate the igniter near the bake burner at the bottom of the oven (remove the bottom panel if necessary). Visually inspect it for cracks or breaks. To test it electrically, use a multimeter set to resistance: a healthy igniter typically reads between 40 and 400 Ohms depending on its type. An open reading indicates failure.

   warning

   Always shut off the gas supply valve before accessing any gas oven components. If you smell gas at any point, leave the area immediately and call your gas company.

   tip

   A healthy igniter should glow bright orange within 30 to 90 seconds when the oven is on. If it glows dim red and takes longer than 90 seconds to ignite the burner, it is likely weak and should be replaced even if it is not fully broken.

9. 9

   Replace the Igniter (Gas Ovens Only)

   With the gas supply and power shut off, remove the oven bottom panel by lifting it up and out (it usually just lifts free after removing one or two screws). Locate the igniter next to the burner tube. Disconnect the igniter's wire connector — it typically unplugs by hand from a ceramic connector block located underneath the oven floor or at the back of the oven cavity. Remove the one or two screws holding the igniter to the burner bracket. Install the new igniter in reverse order: mount it to the bracket, reconnect the wire connector, and replace the bottom panel. Restore gas and power, then test the oven with a thermometer as described in Step 2.

   warning

   Do not touch the igniter's ceramic body with bare hands — skin oils can create hot spots that reduce its lifespan. Handle it by its metal bracket.

   part

   Igniters are model-specific. Confirm your replacement part is correct before installing it. Using the wrong igniter can prevent the gas valve from opening properly.

10. 10

    Test the Oven and Confirm the Repair

    After completing any repair, reconnect power (and gas if applicable) and perform a full temperature test. Place your oven thermometer on the center rack and set the oven to 350°F. Allow it to preheat completely, then check the thermometer every 5 minutes for at least 15 minutes. Average the readings. If the temperature is consistently within 25°F of the target, the repair was successful. If the oven is still not heating correctly after replacing the sensor and/or elements, the control board or thermostat may be at fault — at that point, it is recommended to contact a professional appliance repair technician, as those repairs are more complex.

    tip

    Keep a log of your thermometer readings so you have a clear record of whether the oven improved after your repair.

    tip

    If problems persist after replacing the most common parts, a professional technician can diagnose control board issues more efficiently with specialized tools.