Hello, I have a Whirlpool Steam Duet dryer, model #: WED9600TA1. It was running fine for 6 loads throughout the day. Then I went to start it with my final load, when I pushed the start button, it made a clicking noise and would not initiate drying cycle. I unplugged for a few minutes, plugged back in and tried it again. Same response. Before I spend money on a repairman, I'd like to know what it could possibly be and if it's even worth repairing as I've had for 15-16 years. Thank you.

Yes it is repairable. The F01 error code is a internal failure code of the main control board and it will need to be replaced. The control board you need for that model is linked below:

https://prismparts.com/products/oem-whirlpool-dryer-electronic-control-board-pp7826106?_pos=1&_sid=78a3da3cd&_ss=r

Instructions to replace it can be found on the page linked below:

http://www.appliancecodes.com/repairs/how-to-fix-whirlpool-duet-dryer-f01-error/