Quick Answer
If your oven temperature is not accurate, first verify it with a separate oven thermometer placed on the center rack. Ovens naturally cycle above and below the set temperature, but repeated undercooking, burning, long preheat times, or readings that stay far off target may point to calibration, sensor, control board, igniter, heating element, convection fan, or door seal problems. Call for repair if temperature errors continue after basic checks.
Symptoms at a Glance
Food burns before the timer ends
Likely cause: Oven running hot, bad sensor, calibration issue, or broil element staying active.
Homeowner action: Verify with an oven thermometer.
Food is undercooked
Likely cause: Oven running cool, weak bake element, weak gas igniter, bad sensor, or door seal leak.
Homeowner action: Check preheat and use a food thermometer.
Long preheat time
Likely cause: Weak heating element, igniter issue, control fault, or low gas flow.
Homeowner action: Note preheat time and stop if ignition seems delayed.
Temperature swings wildly
Likely cause: Sensor, thermostat, control board, relay, or convection fan issue.
Homeowner action: Track readings over time, not one snapshot.
One side cooks faster
Likely cause: Rack position, blocked airflow, failed convection fan, or uneven element heat.
Homeowner action: Reposition racks and avoid covering vents.
Gas smell or delayed ignition
Likely cause: Igniter, burner, valve, or gas supply issue.
Homeowner action: Stop using the oven and call for service.
Repair Difficulty Meter
DIY difficulty: Low for thermometer checks, rack placement, door seal inspection, and settings review.
Estimated time: 20-45 minutes for safe homeowner checks.
Tools needed: Oven thermometer, food thermometer, flashlight, owner's manual, and notepad.
Safety risk: Moderate to high because ovens involve high heat, electricity, gas, and hot surfaces.
When to call a professional: Call when the oven stays far off target, smells like gas, sparks, trips a breaker, will not ignite reliably, or needs sensor, element, igniter, or control testing.