What does AF mean on my ipso dryer it's industrial? I'm not getting any heat just air

SOURCE: Dryer words (AF) what does this means?

Low air flow. Means that your vent is blocked or crushed and check your lint trap also

SOURCE: AF flashing on our Whirpool Cabrio Dryer.

Hi Terry,

AF flashes if a restricted airflow condition exists. Check to make sure the lint screen is clean, the door seal is in place and the vent is not
obstructed.
I suspect it's the vent connecting the dryer to the wall or the vent pipe in the wall to the outside. Without moving your dryer, look behind it to see if the flex duct is crushed or pinched. If it is, it's pinching off your air flow, too. Pull the dryer out straighten or replace the hose (you can get vent hose at Home Depot, Lowes or Ace Hardware) then slide the dryer back being careful to keep it about 8" from the wall (8" is the recommended distance from the back of the dryer to the wall, btw).
If the flex vent is NOT pinched off, then you should call a chimney sweep to come out and clean the vent pipe that's in the wall.

*Note---> If you want to test this diagnosis to verify it, just disconnect the flex hose from the wall and run a load of clothes. The error code should not reappear.

SG

SOURCE: the dryer display for the time is displaying "AF".

"AF" means there is an air flow problem within the venting system. There is either a restriction in the hose, outside vent cover, the front vent, or maybe the lower blower assist isn't rotating.