[villagetinker]

I good electrician or handyman may be able to help. If the motor is humming (aka trying to start), there may be a component called a 'starting capacitor' that has failed. This could be mounted directly on the motor, or very close by, and usually has slip terminal connections. I have had these fail on various devices over the years, usually fairly easy to replace, IF, you can get to the motor, etc. The tub should have one or more removable panels (front or side) to allow access to the various components that need maintenance. Typically, switches either work or do not work, if they work, the motor starts, if not, there is no noise, and no attempting to start, this is why I think the motor starting capacitor has failed. When these fail, the motor will not start and tends to just hum, it may eventually trip the internal overload device.
Hope this helps, send me a PM with your phone number if you would like to discuss further.