The A/C compressor clutch relay in a 2008 Honda Accord is located in the engine compartment fuse/relay box, not in the cabin. The lid’s diagram will mark the A/C relay, often labeled AC or A/C.
Primary location and how to identify it
In most 2008 Accord models, the engine compartment fuse/relay box sits on the driver's side of the engine bay. The cover includes a diagram showing each relay and fuse; locate the one labeled A/C or AC. The relay is typically a standard 4- or 5-pin automotive relay.
To help you locate the relay quickly, follow these steps to identify the correct relay in the engine compartment fuse/relay box.
- Open the hood and locate the rectangular engine bay fuse/relay box on the side of the engine bay (often near the battery or strut tower).
- Remove the lid and read the diagram on the underside; look for “A/C” or “AC” in the listing of relays.
- Identify the relay at that position; it will be a standard automotive relay with a top or side marking.
- Carefully pull the relay out straight; inspect for signs of burning or damage, or swap with a similar relay to test (for diagnostic purposes only).
- Install a new relay if the old one is burned or fails a swap test, ensuring it is the same part number and rating.
In most cases, using the box diagram and the "A/C" label on the lid will guide you to the right component. If you can’t locate the A/C relay or if your model uses a different layout, consult the owner's manual or a service manual for your exact trim and VIN.
Different configurations by trim and year
Some early- and late-model Honda Accords used the same engine bay relay box, but a few variations include the A/C relay in a different position or in an interior fuse box. If you still can’t find it after checking the engine bay, check the interior fuse box (driver’s side under the dash) for a separate A/C relay.
Note that working with electrical components can be dangerous; if you’re unsure, have a qualified technician inspect the system.
What to do if the A/C isn’t engaging
Symptoms of a bad A/C relay include the compressor not engaging when the AC is turned on, or clicking from the fuse box when the system cycles. Before replacing the relay, verify AC pressure, electrical connections, and the fuse that protects the compressor circuit. If the relay tests as bad or shows signs of burning, replace it with an identical part.
Summary
For a 2008 Honda Accord, the AC relay is typically located in the engine compartment fuse/relay box with labeling on the cover indicating the A/C Relay position. Locate the box, consult the diagram, and replace the relay if it’s damaged or failing. If you can’t find it, or if your model uses a different layout, refer to the owner’s manual or a service manual specific to your trim.