When I press the start button, I get a loud buzz from the timer switch and no attempt to start. The push start button checked out okay. I am assuming the timer is toast. Prior to this, the heat output and drum rotation was fine. I just thought I would check this with you folks before I start throwing parts at it !
It does sound like a timer problem as long as you are sure that it is the timer or end of cycle buzzer that is buzzing.
You could check the timer contacts with a meter to confirm this.
The reason this is important as sometimes the main motor will buzz if it does not start.