A technician should be dispatched when remote steps cannot establish a safe diagnosis, when a high-voltage or mains-related component requires replacement, when the optical output cannot be verified by the customer, when a mechanical actuator is unstable, or when repeated remote repairs have not solved the problem.
The red light therapy bed supplier should define technician qualifications, travel coverage, expected arrival times, and the tools and test instruments they will bring. A technician who can replace a board but cannot verify the repaired unit is not providing complete service.
