03 f150 a/c question

younggun21 · 04-20-2008, 10:37 PM

Its my friends moms truck the ac blows cold but won't blow out of the dash vents. It will blow out of defroster and feet but not the dash. I'm thinking vaccum line. But where, and how to fix it. Any suggestions would be awesome.

BLiZZ · 04-21-2008, 10:48 AM

Sounds like a clog in the ducting somewhere. Does the heater work? Does anything blow out of the vents? Could try vacuuming out the ducting, or checking fuses to the blower motors.

I would start there, it's cheapest.

crabtruck · 04-21-2008, 11:23 PM

Welcome to the forum younggun. Think about de-energizing the airbags if digging too far.

younggun21 · 04-23-2008, 10:15 PM

Thanks for the help but no dice any suggestions? I am really puzzled now.

poschevy88 · 05-11-2008, 09:44 AM

I had this problem with a Chevy Astro van, it turned out to bo a one way vacuum valve the vent controls are all vacuum operated and default to the defrost. it is under the hood and looks like a big diode in the vacuum line going into the firewall. Dont know if the Ford is the same but it is and easy check. Hope this helps. tom

04-20-2008, 10:37 PM	#1
younggun21 Junior Member Join Date: Nov 2007 Posts: 5	03 f150 a/c question Its my friends moms truck the ac blows cold but won't blow out of the dash vents. It will blow out of defroster and feet but not the dash. I'm thinking vaccum line. But where, and how to fix it. Any suggestions would be awesome.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
93 f150 won't start	79Bronco	Ford Truck Forum	1	07-15-2007 12:17 PM
need help 86 f150	patruckboss	Ford Truck Forum	4	06-05-2007 09:11 PM
97 F150 4x4	Bull	Ford Truck Forum	5	05-30-2007 04:57 AM
95 F150 Stall	stevied	Ford Truck Forum	0	12-28-2006 07:58 AM
97 f150 4.2	gdog1968	Ford Truck Forum	1	12-19-2005 03:06 PM

04-21-2008, 10:48 AM	#2
BLiZZ Junior Member Join Date: Apr 2008 Location: Outside Posts: 9	Sounds like a clog in the ducting somewhere. Does the heater work? Does anything blow out of the vents? Could try vacuuming out the ducting, or checking fuses to the blower motors. I would start there, it's cheapest.

04-21-2008, 11:23 PM	#3
crabtruck Senior Member Join Date: Jul 2007 Posts: 1,464	Welcome to the forum younggun. Think about de-energizing the airbags if digging too far.

04-23-2008, 10:15 PM	#4
younggun21 Junior Member Join Date: Nov 2007 Posts: 5	Thanks for the help but no dice any suggestions? I am really puzzled now.

05-11-2008, 09:44 AM	#5
poschevy88 Full Member Join Date: May 2008 Location: Orlando Fl Posts: 21	I had this problem with a Chevy Astro van, it turned out to bo a one way vacuum valve the vent controls are all vacuum operated and default to the defrost. it is under the hood and looks like a big diode in the vacuum line going into the firewall. Dont know if the Ford is the same but it is and easy check. Hope this helps. tom