Technician A says it is best to check the opening and closing of automatic doors in manual mode. Technician B says that automatic doors do not need to be adjusted. Who is correct?

Checking the opening and closing of automatic doors in manual mode is a crucial practice to ensure that the doors are functioning correctly and safely. By operating the doors manually, you can assess their movement without the influence of automatic controls, which allows for a thorough inspection of any mechanical issues, misalignments, or other potential problems that might affect their automated function. This step is essential in maintaining safety and proper operation, making Technician A's statement accurate.

On the other hand, the assertion that automatic doors do not need to be adjusted is misleading. Automatic doors often require periodic adjustments for optimal performance due to wear and tear, environmental factors, and usage patterns. It is vital to ensure that these doors operate efficiently and meet safety standards, which may involve adjustments from time to time.