Most ovens are 25–50°F off from the set temperature. Test yours by placing an oven thermometer in the center rack and preheating to 350°F. Many ovens have a built-in calibration setting (check your manual). If the temperature sensor or thermostat has failed, that's a $120–$250 repair. Uneven cooking (hot spots) is usually caused by a failing bake or broil element, or a broken convection fan.
Your cookies burn on the bottom but are raw on top. Your chicken takes 30 minutes longer than the recipe says. Your oven says 350°F but acts like 400°F. Temperature inaccuracy is one of the most common — and most frustrating — oven problems we fix in Port St. Lucie.
Step 1: Test Your Oven's Actual Temperature
Buy an oven thermometer ($8–$15 at any hardware store). Place it in the center of the middle rack. Preheat to 350°F and wait 20 minutes after the preheat beep. Check the thermometer. Write down the reading. Repeat at 300°F and 400°F to see if the offset is consistent.
Example: If your oven reads 375°F when set to 350°F, it's running 25 degrees hot — a very common and easily fixable issue.
Step 2: Use the Built-In Calibration Feature
Most modern ovens (Samsung, LG, GE, Whirlpool, KitchenAid) have a calibration offset setting in the menu. You can adjust the displayed temperature up or down by up to 35°F in 5°F increments without any parts or tools.
How to access it: Press and hold the Bake button for 5 seconds (most GE/Whirlpool models), or go to Settings > Calibration on touchscreen models (Samsung/LG). Check your owner's manual for exact steps. This is a free fix that takes 60 seconds.
Step 3: When to Call a Technician
Call Treasure Coast Appliance Repair at (772) 353-5791 if any of these apply:
- Temperature is off by more than 50°F — the oven temperature sensor (RTD probe) or thermostat has likely failed. Repair: $120–$200.
- Temperature fluctuates wildly (swings 100+ degrees up and down) — the temperature sensor wire may be damaged or the control board relay is failing. Repair: $150–$300.
- Uneven cooking (hot spots) — one side cooks faster than the other. This is usually a failing bake element (bottom) or broil element (top). The element may have a visible crack or burn spot. Repair: $120–$250.
- Convection fan not spinning — if your oven has convection mode but air isn't circulating, the convection fan motor has failed. Repair: $150–$280.
Common Oven Temperature Issues by Brand
| Brand | Common Issue | Typical Repair Cost |
|---|---|---|
| Samsung | Temperature sensor failure | $130–$200 |
| GE/GE Profile | Bake element burnout | $120–$220 |
| Whirlpool/Maytag | Calibration drift | $ (DIY calibration) |
| LG | Convection fan motor | $150–$280 |
Written by Marcus, Owner & Lead Technician
17+ years of appliance repair experience in Port St. Lucie and the Treasure Coast. Licensed, insured, and factory-trained on all major brands.
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