Like I said, that will help with the easy to diagnose stuff. What about the complex problems, that don't show up on a scanner.
For example, the equipment used to calibrate your air conditioning system. Its more complicated then fill to the manufacturer spec. Newer machines will run the air with a temperature probe, and modify the amount of freon to get an optimal amount.
For example, the equipment used to calibrate your air conditioning system. Its more complicated then fill to the manufacturer spec. Newer machines will run the air with a temperature probe, and modify the amount of freon to get an optimal amount.