What is your dryer not doing? Have you tested the thermal fuse and thermistor. Sometimes these things will throw out a false error code.
When I press and hold the start button it goes through the “sensing” cycle once it gets to “wet” something inside makes a clicking sound and it gives me the F-01 code.
I replaced the thermal fuse before and that fixed another problem that I was having. Dryer worked fine for a while until I got the F-01 code.