ac/ht fan blower not working right (Full Version)

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ac/ht fan blower not working right

ranchhorse -> ac/ht fan blower not working right (5/5/2008 7:16:20 PM)
99.5 CC DRW 6Spd 4WD 7.3l; ac htr fan blower only blows out of the defrost vents no matter where dial is set to (except off). Any ideas what the problem is? Thanks, Luke

Hayapower -> RE: ac/ht fan blower not working right (5/5/2008 7:47:33 PM)
The 'default' position for the venting control is 'defrost' if you have a vacuum leak.. But being it's 7.3,, it's equipped with a electric vacuum pump.. First thing to check would be the pump mounted on the right/passenger inner fender and verify its running.. Is this truck ESOF equipped? (Electronic shift on the fly 4x4) or does it have a manual transfer case?

ranchhorse -> RE: ac/ht fan blower not working right (5/6/2008 3:39:42 AM)
The transfer case is manual.

craigatkins -> RE: ac/ht fan blower not working right (5/19/2008 3:08:50 PM)
how do you check to see if the vacume pump is working, can you hear it?

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