Convection fan does not run in fan-assisted modes, oven heats unevenly

Safety first: Disconnect mains power and allow the oven to cool completely before working near the fan.

• Access the fan: Remove the rear interior panel to expose the convection fan and motor shaft.
• Check for free rotation: Try turning the fan blade by hand. It should spin freely without grinding. If it is stiff or seized, the motor is likely faulty.
• Inspect for obstructions: Remove any food debris, foil, or grease buildup that may be blocking the fan.
• Test motor windings: Access the motor terminals from the rear of the oven. Disconnect the wires and measure resistance. An open circuit indicates a failed motor.
• Check power to motor: With the oven reconnected and set to a fan-assisted mode (use extreme caution), measure voltage at the motor terminals. If no voltage is present while the control calls for fan operation, the relay or control board is defective.
• Replace motor if needed: Remove the fan blade retaining nut, pull off the blade, and unbolt the motor from the rear panel. Install a Sauter-compatible convection fan motor, reassemble, and test.