What safety precautions should be taken when servicing an A/C unit?

When servicing an A/C unit, it is crucial to ensure safety for both the technician and the equipment involved. Disconnecting power before beginning any work on the unit is fundamental because it prevents the risk of electrical shock or accidents caused by the equipment being accidentally turned on during maintenance. Without disconnecting the power, technicians could inadvertently come into contact with live wiring, potentially leading to serious injuries.

Wearing protective gear, such as gloves and safety goggles, further enhances safety by providing a barrier against sharp metal edges, refrigerants, and other hazards that may be encountered during servicing. The combination of disconnecting the power source and wearing the appropriate protective equipment creates a safer working environment, allowing the technician to work confidently and effectively.

The other options present practices that could endanger the technician or compromise the safety of the service environment. Connecting power before ensuring safety would create a risk of shock, while reducing airflow during testing can lead to inaccurate readings and ineffective troubleshooting. Additionally, delaying maintenance can exacerbate problems within the A/C system, leading to more extensive and hazardous issues down the line.