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Discussion Starter #1
I can hear it blowing inside the dash but it hardly comes out the vents, back works fine but you have to run full blast to get air out of front vents. I pulled blower motor and ran it in all positions and it's definitely blowing air just from holding it. Any ideas where to look for an issue?
 

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My 03 expedition did the same thing. Was a vac hose pulled out of a grommet. On the expy, right above the heater core hoses by the firewall there were a few vac hoses coming through via a black grommet. Pulled that grommet out and behind it (behind the firewall) only one of the hoses was connected to that back side. Hooked it back up and everything worked fine and has worked fine for 70k miles.
 

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Discussion Starter #4
I'll check some vac lines to see if everything is good. Anybody got an online source for a service manual diagrams on the hvac?
 
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