Oven Repair / Symptom Guide
Oven Temperature Not Accurate — Runs Hot, Cold, or Uneven
When food burns, undercooks, or bakes unevenly, the oven reaches a temperature — just not the right one. The cause is usually the temperature sensor, calibration drift, a weak heating element, or convection airflow. A $10 oven thermometer pinpoints most of it.
BHGS Licensed #50446 · Same-day service · $60 diagnostic credited toward repair
Common Causes
1. Failing temperature sensor (RTD probe)
The thin metal sensor inside the oven tells the control board the temperature. As it drifts, the board heats to the wrong target — usually too hot or too cold by 25-75°F.
2. Calibration drift
Over years, an oven's calibration slips. The dial says 350°F but the cavity is 310°F or 390°F. Most ovens have a user-adjustable calibration offset to correct this.
3. Weak or partially failed heating element
A bake or broil element that's aging heats slowly or unevenly. The oven struggles to hold temperature, so the bottom or one side cooks differently.
4. Convection fan not running (convection ovens)
If the convection fan fails, hot air stops circulating and the oven bakes unevenly — hot spots and cold spots — even at the "right" temperature.
5. Bad door seal / warped door
A worn door gasket or a door that doesn't close flush lets heat escape. The oven runs cold and cycles constantly trying to catch up.
What You Can Check Yourself
Try these in order — most take 5-10 minutes and many resolve the problem without a service call.
- 1
Measure with an oven thermometer
Put a standalone oven thermometer on the center rack. Set 350°F, wait 20 minutes for full preheat + stabilize, then read it. Note the gap — e.g. "set 350, actual 310" — this is the key data point.
- 2
Adjust the calibration offset
Most ovens let you offset calibration in the settings menu (often ±35°F). If the thermometer shows it runs 40°F cold consistently, dial in +35-40°F. Re-test.
- 3
Check the door seal
Inspect the rubber gasket around the door for gaps, tears, or hard spots. Make sure the door closes flush. A heat leak makes the oven run cold no matter the setting.
- 4
Watch the elements heat
During preheat, look through the window. Both elements (bake at bottom, broil at top) should glow evenly bright orange. Dark sections or a slow glow = a weak element.
- 5
Confirm the convection fan spins
On a convection oven, set a convection mode and listen/look for the rear fan running. No fan = uneven baking even at the correct temperature.
When to Call a Pro
- →Oven is off by 50°F+ and calibration adjustment does not fix it (temp sensor)
- →One element glows unevenly or not at all
- →Convection fan does not run
- →Oven cycles constantly and never holds temperature (sensor or control board)
Typical cost
$60 diagnostic. Temp sensor $150–$230. Heating element $180–$280. Convection fan $200–$320.
Service Areas
We provide oven repair service in Calabasas, Woodland Hills, Thousand Oaks, West Hills, Agoura Hills, Hidden Hills, Simi Valley, Canoga Park, Chatsworth, Topanga, Westlake Village, Oak Park, and Newbury Park, and nearby communities throughout the West San Fernando Valley.
Need a Pro Now?
Local technician, same-day service in most of LA County. $60 diagnostic credited toward your repair. 30-day warranty on every fix.