When it goes click but doesn't knead, I believe the motor is "dead".
In my case, we took it apart and found a couple of fuses. One easy to
replace (not blown in my case) and one difficult (inside the motor
itself, a temperature-fuse). We replaced the fuse (a non-trivial
operation, but possible if you don't mind taking the motor apart) and
the machine continued to work for some additional time (weeks or
months, I forget) before dying a more serious death (grinding away
the teeth on an important gear).