Where is the ac heat relay switch located on a 2006 Ford Fusion?

The AC heat relay switch on a 2006 Ford Fusion is typically located in the fuse box. The main fuse box is found in the engine compartment, near the battery. You may also find a secondary fuse box inside the vehicle, under the dashboard on the driver's side. For precise identification, refer to the vehicle's owner manual for the exact location and diagram of the relay.