when i turn on my air conditioner, air only blows out of the front vents, on 2008 Chrysler Pacifica

it wont blow in either of the rear vents.

Asked by for the 2008 Chrysler Pacifica
There is a separate fan for the rear vents. It is located under the front center console. I would check the relay for that fan, as well as check the plug and wiring to it.