Wolf M Series Code 4910: Upper cooling fan stall detected

What 4910 means

Code 4910 appears on Wolf M Series wall ovens, for example the SO30TM/S/TH, and on current E Series ovens such as the SO3050TE. It means the sensor that watches the upper cavity cooling fan, a Hall effect sensor, sees the fan stalled. The lower cavity version is 4A10. Expect the number on the display and possibly reduced or stopped heating.

Common causes of 4910

Upper cooling fan jammed or dragging
Dust or debris in the fan housing
Fan motor wearing out and stalling
Fan sensor signal wiring problem

✓ One safe check you can try

1. Turn the oven off and let it cool completely. 2. Look at the vents and cabinet clearances for anything blocking airflow. 3. Reset power at the breaker for one minute. 4. Run a short bake and listen for a steady fan sound. A rattling, grinding or silent fan means it is time to book us.

! Why to stop there

A stalled fan needs to be inspected from inside the oven housing, which owners should not open.
Cleaning or replacing the wrong part can leave the stall in place.
We check the fan and sensor reading, then quote in writing before starting.
Repairs include a 30-day workmanship warranty.

Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.

→Same appliance

Other Wall Oven codes

0121Wolf M Series Oven Code 0121: upper right convection relay shorted 0221Wolf M Series Code 0221: Upper Bake Element DLB Shorted 0321Wolf M Series Oven Code 0321: Broil Relay Shorted on the Upper Element 0421Wolf M Series Code 0421: upper left convection relay shorted 0630Wolf M Series Oven Code 0630: Auxiliary DLB Shorted 2720Wolf M Series Code 2720: Element or door lock watchdog failure 4031Wolf M Series Code 4031: Upper bake element not detected 2820Wolf M Series Code 2820: Relay board door lock relay circuit

49104910 questions

What does 4A10 mean compared with 4910?

They are the same stall message for different cavities: 4910 is the upper cooling fan and 4A10 is the lower. On a single oven you will only meet the upper one.

Does the same code show on E Series ovens?

Yes. The current E Series, such as the SO3050TE, uses the same 4910 message for an upper cooling fan stall, so the meaning does not change between those two lines.

Is a noisy fan the cause?

A noisy or slow fan is a common reason a stall is reported. We confirm by checking the fan itself, not by guessing from sound alone.