Before leaving a customer's home, what must technicians ensure?

Technicians must ensure that all equipment is functioning properly and that the customer is satisfied before leaving a customer's home because this practice directly contributes to customer satisfaction and service quality. Ensuring that all equipment operates correctly demonstrates professionalism and helps prevent future service issues that could lead to customer dissatisfaction. This step is critical not only for building trust and rapport with the customer but also for reducing the likelihood of callbacks, which can be costly in terms of time and resources. By confirming customer satisfaction, the technician ensures that any concerns are addressed on-site, leading to a better overall experience for the customer. This comprehensive approach reflects well on the company and enhances its reputation for quality service.

The other options, while important for different reasons, do not capture the essential elements of customer interaction and service quality that are central to a technician's role in the home.