If cookies on one side of the rack come out golden while the other side stays pale, or the oven’s set temperature never quite matches what’s actually happening inside, something in the heating or airflow system has drifted out of spec.
The Sensor Is the First Suspect
A slender probe extends into the cavity and continuously reports the internal temperature back to the control board. Over years of heating and cooling cycles that reading can gradually drift — often by only fifteen to twenty-five degrees — which is small enough that you’d never see a problem indicator, only mediocre baking results.
A Simple Way to Confirm It
Set an independent oven thermometer on the center rack, run a normal preheat, and compare its reading to your set temperature once it settles. A gap that repeats across multiple bakes points to the sensor rather than a one-time fluke.
Don’t Overlook the Convection Fan
On convection settings, a fan running slower than it should, or one blocked by a baking sheet pressed too close to the back wall, creates hot and cool pockets that can look exactly like a sensor problem while having nothing to do with it.
A Door Seal Can Be the Real Culprit
A gasket that’s compressed flat or torn in one spot lets heat bleed out continuously during baking, forcing the element to cycle harder just to hold the set point — and unevenly at that, since the loss isn’t uniform around the door frame.
Getting It Fixed
Sensor and gasket replacement are both routine, affordable repairs. Visit our oven repair page to book a diagnostic.