As with an automobile, you can get somebody down the street to fix the machine at your peril. The privce is reasonable for an inducer and control board. As an experiment, get the price of the model and serial number of each part plus tax and shipping from one of the web parts suppliers. Then add the cost per hour and benefits of your work hour for the hours you think the repair will take. Include amortisation of all the tools and instruments you would really need and include the time to pick up the parts with your car.
That is called time and material and is why you pay a professional. In comparison call a doctor or lawyer and ask his fee just to talk to you at his office without fixing a thing.