Oven Convection Fan Not Working? 6 Causes and What to Do
A convection fan that will not spin is usually a failed fan motor, a seized blade, a door switch or a relay on the control board. Here is how to narrow it down.
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Why is my oven heating unevenly?
An oven that heats unevenly usually has a failing bake or broil element, a weak gas igniter, a faulty temperature sensor, a broken convection fan, or a worn door gasket. How you load the oven can also cause uneven results.
The first step is to find out what your oven is really doing. The dial or display shows the temperature you asked for, not always the temperature inside.
Why is my oven not heating up all the way?
An oven that will not reach the set temperature usually has a failing bake element, a weak gas igniter, or a bad temperature sensor. On electric ovens, one dead element of the two (bake or broil) can let the oven warm but never reach 350°F. On gas ovens, a worn igniter opens the gas valve late or not at all, so the oven stalls well below the setting.
- Electric: watch the bake element during preheat. If it does not glow red, it has likely failed.
- Gas: look through the broiler drawer or bottom panel. If the igniter glows for more than about 90 seconds before the flame lights, it is weak.
- Either type: an error code or a display that reads far from a thermometer points to the sensor or control board.
How do you test your oven's temperature?
Put an oven thermometer on the center of the middle rack, set the oven to 350°F, and check it 20 minutes after preheat ends. Check it again a few times over the next half hour, since ovens cycle up and down.
The USDA explains how to use appliance thermometers. A small swing is normal. If your oven runs more than about 25°F hot or cold on average, something needs attention.
An oven that runs cold is also a food safety issue for meat and poultry. Use a food thermometer and the safe minimum internal temperatures chart until it is fixed.
What are the 5 most common reasons?
1. A failing bake or broil element
On electric ovens, look at the element at the bottom while the oven heats. It should glow evenly. Dark spots, blisters, or a crack mean it is failing.
2. A weak gas igniter
On gas ovens, the igniter must get very hot before the gas valve opens. A weak igniter glows but takes too long, so the oven heats slowly or unevenly.
3. A faulty temperature sensor
The sensor is a thin probe at the back of the oven. If it reads wrong, the oven may overshoot or undershoot. A technician can test it with a meter.
4. A broken convection fan
Convection ovens use a fan to move hot air. If the fan stops or slows, you get hot and cold zones. Listen for the fan, or look for it not turning in convection mode.
5. A worn door gasket
If the rubber or mesh seal around the door is torn or flat, heat escapes. Food near the door cooks more slowly.
What can you fix yourself?
- Leave space between pans and the oven walls so air can flow.
- Do not cover racks with foil. It blocks heat and can damage the oven.
- Rotate pans halfway through baking.
- Preheat fully before you put food in.
- Use the calibration setting in your manual if the oven is off by a steady amount.
Element glowing in spots or igniter slow to light? Call us and a technician can test the part and quote the fix.
Is a gas oven problem a safety issue?
It can be. A gas oven that struggles to light or burns with a yellow flame should be checked. Never use a gas oven to heat your home.
The EPA's guide to preventing carbon monoxide poisoning recommends having gas ranges and ovens inspected by a trained professional. If your cooktop burners also give you trouble, see our guide on gas burners that won't light.
When should you call a technician?
Call if your oven is more than about 25°F off after preheat, if an element is damaged, if a gas oven is slow to light, or if the convection fan has stopped. Our oven repair service covers wall ovens and ranges from Wolf, Thermador, Viking, GE, Bosch, and more. Our repair cost guide shows typical oven repair prices.
Frequently asked questions
How do I know if my oven temperature is off?
Place an oven thermometer in the center of the middle rack, set the oven to 350°F, and wait 20 minutes after preheat. A reading more than about 25°F off points to a sensor, element, or calibration problem.
Is it normal for an oven to have hot spots?
A little, yes. Most ovens are slightly hotter at the back or top. Large differences, like food burning on one side every time, usually mean a failing element, fan, or igniter.
Why does my gas oven take so long to heat up?
A weak igniter is the most common cause. It glows but does not get hot enough to open the gas valve quickly, so preheat takes much longer than normal.
