Omega OO640X Operating And Installation Instructions page 13

OVEN FUNCTION CONTROL CHART
Note: Oven shelves are numbered from 4 at the top down to 1 at the bottom (from 10 to 1 for OBO655GG).
During heated oven functions a cooling fan in the top of the oven will operate in order to cool down the oven door
and kitchen cabinet as well as reducing condensation in the oven. There will then be a slight release of warm air
from the top of the closed oven door. This is not a leak in heat from the oven cavity.
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