Why do I hear humming noises from a product when it cooks food normally?
1. Humming noise from an oven can be heard.
1. The noise is heard when a cooling fan is running.
2. Please be assured that the noise does not affect performance of a product.
How to fix
1. Noise level can be higher if the oven is placed on a sink or steel container.
2. Do not install the unit in a cabinet or an enclosed area.