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only defrost works... wtf #1216681 03/16/05 04:37 AM
Joined: Mar 2004 Posts: 27 Prince Rupert BC. N nasscar_z OP New CEG\'er
OP nasscar_z New CEG\'er N Joined: Mar 2004 Posts: 27 Prince Rupert BC.	can anyone tell me why only the defrost works even if I put it on vent or floor they all come out the defrost, even a/c. any ideas or solutions? thanks.

Re: only defrost works... wtf #1216682 03/16/05 05:23 AM
Joined: Jul 2004 Posts: 862 9 96mercury Veteran CEG\'er
96mercury Veteran CEG\'er 9 Joined: Jul 2004 Posts: 862	Well I think it is probably the vacuum switch. It selects between different vacuum solenoids that open doors to let air flow in. So if the switch is broken it won't switch the solenoids to close the defrost and open the main vents. My topaz did this. ATX MTX swap, rear drum disc swap, drilled rotors, ported intake, optim throttle body, CAI, 7.5L MAF, adj. fuel regulator, longtube headers, underdrive pulley, no EGR, low inpedence bigger injectors, 2002 Focus Swap

Re: only defrost works... wtf #1216683 03/16/05 05:51 AM
Joined: Mar 2004 Posts: 27 Prince Rupert BC. N nasscar_z OP New CEG\'er
OP nasscar_z New CEG\'er N Joined: Mar 2004 Posts: 27 Prince Rupert BC.	What did you do?

Re: only defrost works... wtf #1216684 03/16/05 08:47 AM
Joined: Jul 2004 Posts: 862 9 96mercury Veteran CEG\'er
96mercury Veteran CEG\'er 9 Joined: Jul 2004 Posts: 862	I sold the car this way But just get the HVAC position switch on the dash from a wrecking yard and swap it in. Make sure that the switch is getting vacuum when the engine is on cus this could also cause the problem. ATX MTX swap, rear drum disc swap, drilled rotors, ported intake, optim throttle body, CAI, 7.5L MAF, adj. fuel regulator, longtube headers, underdrive pulley, no EGR, low inpedence bigger injectors, 2002 Focus Swap

Re: only defrost works... wtf #1216685 03/17/05 04:23 AM
Joined: Jun 2004 Posts: 3,065 M Matt R_dup1 Hard-core CEG\'er
Matt R_dup1 Hard-core CEG\'er M Joined: Jun 2004 Posts: 3,065	Originally posted by 96mercury: Well I think it is probably the vacuum switch. It selects between different vacuum solenoids that open doors to let air flow in. So if the switch is broken it won't switch the solenoids to close the defrost and open the main vents. My topaz did this. Hence this is the reason why you hear a "hiss" when you switch to another selection. [color:"green"]-Matt R '99 Tropic Green LX, Zetec, ATX

Re: only defrost works... wtf #1216686 03/17/05 05:01 AM
Joined: Mar 2003 Posts: 7,117 West Palm Beach, FL - Going to... T TourDeForce Hard-core CEG'er
TourDeForce Hard-core CEG'er T Joined: Mar 2003 Posts: 7,117 West Palm Beach, FL - Going to...	'Scuse me. Could be just the vac tubes are un-plugged. Can happen, especially if you've got big feet. Try to look behind the HVAC controls somehow & see if you can determine if anything has come unplugged. I've seen at least 2 posts about this. Must be that jumbly-wumbly thing happening again.

Re: only defrost works... #1216687 03/18/05 02:10 PM
Joined: Sep 2002 Posts: 1,788 St. Louis, MO P projectSHO89_dup1 Hard-core CEG\'er
projectSHO89_dup1 Hard-core CEG\'er P Joined: Sep 2002 Posts: 1,788 St. Louis, MO	Originally posted by TourDeForce: 'Scuse me. Could be just the vac tubes are un-plugged. Can happen, especially if you've got big feet. Try to look behind the HVAC controls somehow & see if you can determine if anything has come unplugged. I've seen at least 2 posts about this. Yep. Stick your head up under the over the gas pedal and check for a loose line at the vacuum motor. If it is good, you will need to trace the source vacuum line from the HVAC control head through the firewall for the intake manifold port. If the HVAC system looses vacuum, it defaults airflow to the defroster vents. Steve PS. Consider yourself fortunate. I had typed almost this whole thing before I noticed the MAJOR annoyance in your thread title.... 98 Contour SE Sport 2.5 Duratec ATX The wifey's car 89 Taurus SHO - 246K miles 94 SHO ATX - 190K 1997 F-150 5.4L ATX - The Workhorse 150K. ANY THREAD WITH "OMG" or "WTF" ETC IN THE TITLE WILL BE IGNORED!

Re: only defrost works... #1216688 03/23/05 09:16 AM
Joined: May 2004 Posts: 398 Ut, USA I in the shop CEG\'er
in the shop CEG\'er I Joined: May 2004 Posts: 398 Ut, USA	im all about the simple explination LINKY cardomain 98 Contour SE zetec I-4

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