Locate the main breaker panel in your home and flip the switch that controls the AC circuit to the "Off" position.
Locate the access panel on the front of the AC unit. This panel covers the internal coils. It will likely be located on the bottom of the unit.
Remove the access panel to expose the drip pan, located under the coils. There will be a drain pipe connected to the pan.
Loosen the pipe where it connects to the drain pan using your wrench. Remove the pipe.
Locate the connectors on the side of the drip pan itself. This is where the pan connects to the AC unit.
Loosen the coupling where the pan connects with your wrench and remove the pan from the AC unit.