HELP

  • Tiny
  • masbas125
  • 1998 Ford Contour
  • 4 CYL
  • 2WD
  • automatic
  • 112,000 miles

My air conditioner is working but the air is only coming out through the defrost vents.

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Monday, August 8th, 2011 AT 5:52 PM

4 Replies

  • Tiny
  • caradiodoc
  • Expert
  • 25,619 posts

Look under the hood for a vacuum hose that's disconnected or cracked that feeds the vacuum controls for the heater / AC system.

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Monday, August 8th, 2011 AT 6:56 PM
  • Tiny
  • masbas125
  • Member

No havent messed with anything yet. Check engine light came on and I had it checked and code came up so I bought the camshaft sensor to make it go away. They said it was an easy fix so I want to do it myself.

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Tuesday, August 9th, 2011 AT 5:53 PM
  • Tiny
  • masbas125
  • Member

Wrong question sorry wrong I meant to ask I couldn't find a leak should I just change the hose anyway.

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Tuesday, August 9th, 2011 AT 7:14 PM
  • Tiny
  • caradiodoc
  • Expert
  • 25,619 posts

If there's no leak, there's no point in replacing a hose. Blowing from just the vents under the windshield is a common problem with vacuum-controlled systems. The various vacuum motors are spring-loaded to go to the defrost position when there's a failure. Your feet might freeze in winter but the windshield will be clear.

Before tearing into the dash to check for vacuum, look for a small plastic hose going from the engine to the firewall. There will usually be some kind of check valve or storage canister inline with that hose. That's a good place to check for vacuum when the engine is running.

If you hear something moving in the dash when you operate the heater controls, there could be a defective actuator or a broken linkage. The clue is some functions will work and others won't. It's when nothing changes and there's no sounds that a loss of vacuum should be suspected.

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Tuesday, August 9th, 2011 AT 8:07 PM

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