Hi @themezz_315,
There is a check ball in the sump that is used to prevent drain water flowing back into the dishwasher (siphoning). That's most probably the reason why the air is not getting though.
Please confirm the full model number of the dishwasher?
There are 12 models beginning with FFBD2406NW i.e. FFBD2406NW0A→FFBD2406NW6A & FFBD2406NW7B→FFBD2406NW11B and they're not all the same. This is to ensure that if parts are needed that the correct one can be linked.
Hi @themezz_315
Here's the service data sheet for the dishwasher.
Perform the Water Service Test > While in idle mode procedure and check Step.7 to see if you hear the drain motor operating etc.
Besides the check ball there's also a flapper valve that may cause no water to drain. The link has a video that you can view to check to see if it is OK. If it needs replacing, search online for the manufacturer's part number to find suppliers that suit you best.
Here's a video that shows how to see if the check ball is OK. The part number for the ball in your model is as shown on the video
crwdns2934105:0crwdne2934105:0
crwdns2934113:0crwdne2934113:0
crwdns2915270:0crwdne2915270:0
crwdns2889612:0crwdne2889612:0
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