1. You and your company appear more thorough and professional.
  2. The customer is not rushing you to leave because he feels he is paying by the minute.
  3. You may find other problems and save the customer a future service call while increasing the dollar amount of the current call. Profitability goes up, as you are already onsite with no additional travel expense.
  4. Diagnostic fees create value and build trust in your repair recommendations if the diagnostic is done thoroughly and the customer sees your professionalism during the diagnostic.

Sometimes, you cannot always do a thorough diagnosis. If a customer has been under a service agreement and had a recent maintenance visit, you may just repair the apparent problem, knowing that a thorough check had recently been done. However, you should always try to do as many diagnostic procedures as possible.

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