Whirlpool double oven has a loud fan when baking

Do you mean the fan inside the oven box in the back wall. This is the fan for the Convection bake etc. If so this is how it works..

a) Bake feature - that fan does not come on

b) Convection bake - that fan comes on during bake cycle

So that fan works for several features but not for all. It helps to circulate the hot air inside better for a more even, fast bake.

Do you mean the fan in the control board area. It is there to get the hot air trapped in the oven walls out. Not the heat inside the oven bake box area. This fan works differently depending the model and/or brand. Some models fan works from the time you start. Some models fan comes on only when that area reaches a certain high temperature.

Fan is bad or blades are bent hitting frame

Mine does the same thing. Not sure why? Let me know if you find out.

your fuse is bad replace fuse.

Look here: Manual for whirlpool double oven
I downloaded yesterday, it worked!
Only you need to register...

the humming sound is coming from the "squirrel cage" fan in the back of the unit, there may be some resonance vibration from the fan this issue should be addressed by a qualified service tech, the whole wall oven needs to be pulled out, i would have him check the fan.

NEEDS A NEW HEATING ELEMENT

either will work, fan bake will give you a more even cooking though

The fans are not normally repairable, but there is no problem obtaining replacements.
On a double oven, there are usually 2 fans fitted.
There is an external cooling fan usually fitted on the top of the oven, you would have to remove the top cover of oven to access it, and possibly the rear panel as well.
Then there is the fan fitted in the main oven compartment.
If you open the oven door as it is working, you should be able to determine if it is the fan oven or the external cooling fan that is the cause of the problem.
If you determine it is the fan in the oven that is noisy, then to undo the fan blade assy, you have unscrew the nut clockwise to remove it. as opposed to the normal way of undoing a nut.
Please rate my fixya solution.
Thanks.

djpat, in looking at your schematic, it shows that the cooling fan will be on during bake and broil operations as well as cleaning. So this would be a normal operation. Catriver.