Here is the contactor on the left and the fan delay relay on the right. Replace the delay relay on the right.
To test for sure, take a jumper wire and connect terminal 15 to 18 and the fans should come on. It will be the center screw with the little brown jumper wire in it at the bottom pictured and the top right pictured with the red wire in it.
If you need a part then let me know.
