A/C relay or fuse

[Johnandcara2]

When I took my 07 Providence in to have the front dash a/c checked they said all that was needed was a relay in the fuse block on passenger side rear (two black boxes mounted to the wall) . The only thing is no telling which one has gone bad. The fan on the underside doesn't run after a/c has been on for 50 miles or more.The dash a/c will not get any colder? Anyone know which relay/fuse to replace? Thanks in advance.

[BDStinson]

Having exactly the same problem with my 03 Excursion. Maybe one of our threads will find the location for that well hidden relay.