The qualifications and skills of an equipment technician vary greatly. There are general device technicians and specialized technicians who focus on one type of device. General equipment technicians do not need certifications to work. So keep this in mind when dealing with a complex problem or complicated machine like a dishwasher or refrigerator. In this case, it is better to have a specialized technician, since he has undergone further training and education.
Regardless of what type of technician you hire, always do thorough research on the company and the individual before hiring them for your project. They should also be able to provide you with documentation of all their testimonials without hesitation. To further verify if a technician is “factory certified,” you can contact the manufacturer of your device directly to see if they offer such certifications. You can then check the technician’s authorization status.