Fan Noise - Noise Doesn't Stops when Door is Opened - Commercial Range

Fan or Humming Noise from Oven:

The oven is equipped with an automatic cooling fan that runs when the oven is in use and/or after a cycle completes. It helps to cool the enclosed oven cavity and the electronic controls when the oven is in use and/or after the cycle completes. Keeps the electronic controls cool during every oven function such as BAKE, BROIL or CLEAN.

It is normal:

• For the automatic cooling fan to run when the oven is in use and/or after the cycle completes.
• To hear the automatic cooling fan move air when the oven is in use and/or cycle completes.
• The cooling fan will run for an extended period of time until the internal temperature of the cavity reaches safe levels.