A Kenmore oven that heats but runs consistently hot or cold usually has a drifted temperature sensor, not a failed element. Before replacing anything, put an oven thermometer on the middle rack and measure how far off it actually is - the number decides the repair.
Related Services: Oven Repair
This guide separates a calibration problem from a failed part, because they present similarly and the fixes are nothing alike.
Measure before you diagnose
Put a standalone oven thermometer on the centre rack. Set the oven to 350°F and leave it 20 minutes after the preheat chime - ovens overshoot and settle, and reading it too early gives a false number. Then record the reading.
What the number tells you:
Off by 10 to 35°F, steady. A calibration offset. Most Kenmore ranges let you correct this from the control panel without a single part.
Off by 50°F or more, or drifting during the bake. The temperature sensor has failed or is failing.
Heats very slowly, or browns badly on one side. An element or an airflow problem rather than a sensor.
Recalibrating
On most Kenmore electric ranges you hold Bake for several seconds until a calibration offset appears, then adjust with the arrow keys, typically within a range of plus or minus 35°F. Set the offset to cancel the error you measured: if the oven runs 25°F cold, apply plus 25.
Kenmore ranges are built by several manufacturers - Whirlpool, Frigidaire and LG among them - so the exact sequence varies. Check the model number against the manual before assuming.
The temperature sensor
The sensor is a thin metal probe protruding into the cavity, usually at the upper rear left. It is a resistance thermistor: its resistance changes with temperature and the board reads that to decide when to cut the element.
Test it cold with a multimeter across its terminals. At room temperature it should read roughly 1,080 to 1,100 ohms. A reading far outside that, or an open circuit, confirms a failed sensor. It is a straightforward part to replace - one screw inside the cavity and a connector behind the rear panel.
When it is the element instead
A bake element that has partially failed can still glow while delivering less heat than it should. Look for blistering or a scorch mark along the loop. An element that glows unevenly, bright in places and dull in others, is on its way out.
Uneven browning front to back with correct average temperature is usually not the element at all. Check the door seal and the hinges - a door sitting slightly open at one corner bleeds heat continuously, and that shows up as one side of a tray browning faster.
Convection models
On a convection Kenmore, a failed convection fan motor produces exactly the symptom people describe as "not heating properly": the oven reaches temperature but food cooks unevenly because nothing is moving the air. Listen for the fan during a convection bake.
Frequently Asked Questions
How far out is normal?
Plus or minus 25°F is within tolerance for a domestic oven, and most recipes are forgiving of it. It is worth correcting if you bake regularly, since pastry and bread are where it shows.
Can I use the oven while it is running cold?
Yes, if you compensate on the dial and you know the offset. Measure it properly first so you are compensating by a real number rather than a guess.
How much does this cost to fix?
A temperature sensor is typically $30 to $70 for the part, a bake element $40 to $100. Our diagnostic is $100 and applies to your repair labour, with labour on a typical oven repair in the $225-$300 band. A calibration adjustment is often the whole repair and needs no parts at all.
When to call
If calibration will not hold, the sensor reads out of range, or the oven cooks unevenly with a correct average temperature, book an oven repair. Every oven we repair is calibrated against a probe before we leave.