If your oven is consistently off temperature — burning cookies, undercooking roasts, or swinging more than ±25°F — you've got a calibration drift or a failing temperature sensor. Both have easy fixes.
Many oven symptoms can be diagnosed and fixed on the first visit. Flat $149 trip fee, credited toward the repair when you approve it.
Need oven repair? Call 7am–9pm, every day.
Step-by-step
Place a quality oven thermometer in the center of the middle rack. Set the oven to 350°F. Wait 30 minutes after the preheat beep. Compare actual to set temperature. Anything within ±15°F is normal cycling.
Most ovens made after 2005 have a temperature offset in the menu (often labeled 'Bake Adjust', 'Calibration', or under Settings). The range is usually ±35°F. If your oven runs 30°F low, set the offset to +30. Check your owner's manual for the exact button sequence.
Convection ovens: set to convection bake, watch the fan through the window or listen at the back. If it's not running, the fan motor or relay has failed and you'll get hot/cold spots in every bake.
Open the door and run a hand around the silicone seal. Look for tears, hardened spots, or gaps. A failed seal lets heat escape and the burner has to overshoot to keep up — your set temp and actual temp diverge constantly.
Switch off the breaker first. The sensor is a small probe in the upper-rear of the oven cavity; on many ovens it is reachable from inside the cavity by removing two screws, and built-ins are technician work. Disconnect it and ohm it out: should read ~1100Ω at room temp (rises with temperature). Way off = bad sensor, $35 part, 15-minute swap.
(1) Test with a thermometer at 350°F. (2) Find Bake Adjust or the offset setting in the menu. (3) Enter the difference. (4) Retest. The offset is usually limited to about ±35°F.
Run the oven thermometer test again at 350°F. If you're within ±15°F at the set point, you're done. If you're still off after sensor + calibration, the control board is failing.
Stop and call
Safety + model triggers
Gas oven temperature swings 75°F+ AND you smell gas.
Gas valve cycling improperly — leave, ventilate, call your gas utility first.
Breaker trips when the oven holds heat for more than 10 minutes.
Element or wiring shorting as it heats up — escalates to a cabinet fire if ignored.
Wall oven, double wall oven, or pro range (Wolf, Thermador, Viking, Sub-Zero).
Calibration and sensor service on built-ins requires pulling the unit from the cabinet — special tools, two techs.
Calibration maxed out (±35°F) and oven still off after sensor swap.
Control board failing — board replacement on premium ovens often hits replacement-cost territory.
Other reasons to call
FAQs
Modern ovens hold ±15°F at set point during normal cycling. Anything outside that needs calibration, and ±35°F+ usually means a failing sensor or control board.
Most ovens have a 'Bake Adjust' or calibration setting in the control menu — typical range is ±35°F. Verify with an oven thermometer first, then adjust by the difference. Check your owner's manual for the exact key sequence.
No, but it's cheap to replace ($35 part, 15-minute job). The sensor is a sealed thermistor — when it drifts out of spec it gets swapped, not rebuilt.
Failing bake element, weak gas igniter, or door seal letting heat escape. A modern oven preheats to 350°F in 8–12 minutes. Anything over 20 minutes warrants investigation.
Calibration: free DIY. Temperature sensor: $220–$300. Door gasket: $180–$280. Control board: $450–$750. Diagnostic if you've tried calibration: flat $149 trip fee, credited toward the repair.
Related service
Twin Cities specialists in Wolf and Viking pro-style range and wall oven repair — plus Thermador, Sub-Zero/Wolf, Bosch, and every standard gas, electric, and induction oven.
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More guides
An oven that runs hotter or cooler than the dial usually has a drifted sensor, a calibration offset, a weak element, a worn door seal or an uneven airflow problem. The sensor is the most common cause, since the control trusts it to say how hot the oven is. A bad reading means a wrong temperature even when everything else works.
Central Minnesota Appliance Repair sees this across Minneapolis, St. Paul and the metro on both gas and electric ovens. The first step is always to measure the real temperature with an oven thermometer, because baking results alone can mislead you. Cakes that sink, roasts that finish late or cookies that burn on the bottom can have other causes.
| What you notice | Likely cause | DIY-safe check | When to call |
|---|---|---|---|
| Always hotter than set | Sensor out of range or calibration offset | Test with an oven thermometer, adjust the offset | Offset is maxed out |
| Always cooler than set | Weak element, igniter or sensor | Compare the thermometer after 20 minutes | Cooler by a wide margin |
| Hot spots, uneven browning | Rack position, convection fan or warped pan | Rotate pans, check rack level | Convection fan will not run |
| Swings widely during baking | Control board or sensor fault | Log temperatures over 30 minutes | Large swings repeat |
| Long preheat | Weak element or igniter | Time the preheat to temperature | Preheat takes much longer than before |
| Heat escapes around the door | Worn or loose gasket | Look for a gap or a flattened seal | Gasket is torn or door sags |
The $149 trip fee is credited toward the repair when you approve it.
Place an oven thermometer on the center rack, set the oven to a common temperature like 350 degrees, and wait for the oven to signal that it is preheated. Then wait another 15 to 20 minutes and read the thermometer. Ovens cycle on and off, so take two or three readings a few minutes apart and average them.
An oven that swings a bit around the set point is normal. A steady offset is common and can often be corrected in the oven's settings. A large or growing gap, or a wide swing from reading to reading, points to a failing sensor or control.
Many electronic ovens have a temperature adjustment in the settings menu. Check the manual for the steps. A modest offset for a steady error is a normal fix.
Feel around the door seal for gaps, tears or flattened spots. A gasket that no longer seals lets heat escape and the oven works harder.
Place the rack in the middle, use flat, light-colored pans and avoid covering the whole rack with foil, which blocks airflow.
On a convection oven, switch on convection and listen for the fan. A fan that does not run gives uneven heat.
Sensors, elements and gas igniters sit behind panels with live wiring or gas. Turn off power and gas and call if you suspect a part has failed.
Usually yes. A sensor, igniter or gasket is a modest repair on a durable appliance, and a wrong temperature is a good reason to act because it ruins food and, if it runs hot, can stress other parts. A control board on an older range is the case to weigh against replacement.
See the published ranges in our oven repair cost guide, and the oven temperature wrong service page. To book, see oven repair. If the oven doesn't heat at all, read oven not heating or the oven not heating guide.
Dark pans, a rack too low or a bottom element that runs too hot can scorch the bottoms. Try a light-colored sheet on the middle rack before assuming the oven is faulty.
It can mask the problem, but it does not fix it. If the oven is steadily cool, adjust the offset or find the failing part.
The very high temperature of a self-clean cycle can stress sensors and boards. If the oven runs off right after a self-clean, tell the technician.
The beep tells you the sensor reached the set point, not that the cavity is evenly hot. Waiting a few more minutes after the beep gives more consistent results.
Need oven repair? Call 7am–9pm, every day.
