Possible Causes

WARNING: This page is about a different car, the 2005 Mercury Montego, 2005 Ford Freestyle, and 2005 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.

A driver power seat that does not move horizontally and/or vertically can be caused by:

wiring, terminals or connectors.
a faulty seat control switch.
a faulty seat track motor (seat track).
a faulty power recliner mechanism.