You can get a cheap multi-meter @ harbor freight or places like that
It would be money well spent and a time saver also
Just replacing arbitrary parts in hopes you happen to replace the right one is like throwing darts at a moving bullseye
You might even replace all the aforementioned parts and none of them be bad
Other issues cause no heat like the heating element and the motor centrifugal switch and the control timer.
So it your best interest I highly recommend getting a multimeter that checks continuity...
If you do there are many videos to show you how to safely use it