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A. Penland
A. Penland, Ford Senior Master Technician, ASE
Category: Ford
Satisfied Customers: 6667
Experience:  ASE Master Certified, ASE Advanced Gasoline Engine Performance
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98 Ford ranger. air only blows out floor and defroster

Customer Question

98 Ford ranger. air only blows out floor and defroster vents
JA: How long has this been an issue? How many miles are on the car?
Customer: just noticed it about 2 weeks ago and truck has 145,000 miles
JA: What year is your Ranger?
Customer: 1998 v/6 4.0 2wheel drive automatic
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: checked the blend door actuator and it is functioning properly
JA: Anything else you think the mechanic should know?
Customer: that's all
JA: OK. Got it. I'm sending you to a secure page on JustAnswer so you can place the $5 fully-refundable deposit now. While you're filling out that form, I'll tell the Ford Mechanic about your situation and then connect you two.
Submitted: 1 year ago.
Category: Ford
Expert:  A. Penland replied 1 year ago.

This is a default setting when the AC system no longer gets vacuum from the engine. You have a vacuum leak from he engine to the AC controls. The mode door that changes the vents the air comes out of is vacuum controlled. Find the vacuum line on the passenger side of the engine near the fire wall and evaporator case. There will also be a gray vacuum line. Follow it from the engine to the fire wall under the evaporator case. The look under the glove box at the fire wall and follow the vacuum line to the AC control panel. Most of the leaks we find are from bad/broken vacuum lines under the hood around the engine.