To find it, you'll need to:
1. Consult your owner's manual: This is the most reliable source. The manual should have a diagram of both fuse boxes showing the location and amperage of each fuse. Look for fuses related to "A/C," "Air Conditioning," the compressor, or the blower motor.
2. Check both fuse boxes: Systematically check each fuse in both the underhood and interior fuse boxes. Look for any blown fuses (a broken filament or a dark discoloration).
3. Look for a relay: The AC system often uses a relay in addition to a fuse. A faulty relay can cause problems even if the fuse is good. The owner's manual may also show the location of the AC relay.
Without your owner's manual, providing a precise location is impossible. Different trim levels and options might affect the fuse box layout.