A convection fan that isn't working may simply be paused, because many ovens run the fan only in convection modes and stop it whenever the door opens. If it stays still on a convection setting with the door shut, the usual causes are the door switch, something blocking the blade, or a worn fan motor.
In this post:
- •It's paused by design
- •The door switch thinks the door is open
- •Something is blocking the fan
- •The fan motor is worn out
- •The convection element has failed
- •The control isn't sending power to the fan
1. It's paused by design
Convection fans usually run only on convection bake or roast, and many stop the moment the door opens. Some ovens also delay or cycle the fan during preheat.
How to tell: The fan runs in convection modes once the door has been shut for a minute or so, just not on regular bake.
What to do: Check your manual for when your model runs the fan. If what you see matches, nothing is wrong.
2. The door switch thinks the door is open
On many ovens, the switch that turns off the interior light also tells the control to stop the fan.
How to tell: The oven light stays on with the door shut, or the fan starts when you press the door switch plunger by hand. Our post on an oven light that stays on covers that switch in more detail.
What to do: With the oven off and cool, clean around the plunger and make sure the door closes fully. A failed switch needs replacing.
3. Something is blocking the fan
Foil, a misplaced rack or a loose rear cover can stop the blade, and a bent blade can scrape as it turns.
How to tell: Scraping, ticking or grinding from the back wall, or a hum with no airflow.
What to do: With the oven off and cool, take out any foil and make sure the racks and the fan cover sit the way they came. Don't remove the cover or reach behind it.
4. The fan motor is worn out
Convection motors work in high heat, and their bearings wear over time.
How to tell: A squeal or growl in convection modes that gets louder over weeks, a fan that spins slowly, or one that hums without turning.
What to do: Book a technician. The motor is reached from behind the oven's back panel.
5. The convection element has failed
"True" or "third-element" convection ovens have a heating ring around the fan. The fan can spin normally while that element stays cold.
How to tell: The fan runs, but convection modes heat slowly or unevenly while regular bake works. A slow convection preheat is a common sign.
What to do: Have the element tested and replaced. Some ovens heat convection modes with the bake and broil elements instead, so check your manual to see which design you have.
6. The control isn't sending power to the fan
A relay on the control board, and the wiring from it, switch the fan motor on.
How to tell: No fan in any convection mode, no sound from the back wall, and the door switch checks out.
What to do: Have a technician test the relay and the wiring between the control and the fan.
When a technician is the better call
Fan motors, convection elements, relays and wiring all sit behind panels that only a technician should remove. Our oven repair team works on ranges and built-in wall ovens with convection. If slow preheat is your main complaint, a failed element is the more likely cause than the fan.
Marco's advice: Listen before you look. With the door shut on a convection setting, you should hear a steady whir from the back wall. Silence, ticking and a growl each point to a different item on this list.
Convection still not kicking in? Call ProFix LA at (818) 334-4526.