The A/C fuse in a 2008 Honda Civic is usually located in the under-hood fuse/relay box, with a secondary A/C-related fuse or relay in the interior fuse box behind the glove compartment. Start there to verify the circuit is intact.
Two fuse boxes to check
The Civic uses two fuse boxes for the A/C circuit. A diagram on each box cover shows which fuse or relay handles the A/C clutch and compressor, so start by locating those covers.
Understanding the fuse box diagrams
- Under-hood fuse/relay box: Located on the engine bay side (usually near the passenger side along the strut tower). Open the cover and look for fuses labeled A/C, AC, or an A/C RELAY. The A/C clutch relay is often housed in this box as well.
- Interior fuse box: Positioned behind the glove compartment or in the lower dash area on some trims. This box may contain an A/C fuse or A/C clutch relay labeled accordingly in the diagram on the cover.
Always cross-check the exact labels on the fuse box covers or in the owner's manual, because Honda sometimes reassigns fuse labels across trims or markets.
Replacing a blown fuse: a quick guide
If you find the A/C fuse is blown, follow these steps to safely replace it and test the system.
- Turn off the ignition and set the A/C controls to the off position.
- Open the appropriate fuse box cover (engine bay or interior) and locate the A/C fuse or relay using the diagram.
- Remove the fuse with a fuse puller or insulated pliers, and inspect whether the fuse is blown (the metal conductor will be broken).
- Replace with a fuse of the same amperage rating as indicated on the fuse box diagram. Do not substitute a higher-amp fuse.
- Reinstall the cover, start the car, and test the A/C to confirm the compressor clutch engages and cool air is produced.
If the new fuse blows again, or the A/C still doesn’t engage, there may be a deeper problem such as a refrigerant leak, a failing compressor, or a faulty clutch sensor, and you should have the system diagnosed by a professional.
Additional tips and safety
Avoid working with hot engine components or exposed electrical contacts. Ensure the ignition is off, use insulated tools, and handle fuses carefully. If you’re unsure of the exact fuse ratings or locations for your trim, consult the owner’s manual or a professional mechanic.
Summary
In the 2008 Honda Civic, start by checking the under-hood fuse/relay box for an A/C fuse or relay, then inspect the interior fuse box behind the glove box if needed. Use the diagrams on the covers to identify the correct fuse, replace any blown fuse with the same amperage, and test the A/C system. If problems persist, seek professional service for a full diagnosis.