Mechanics

HELP

1998 Ford Contour • 4 cylinder 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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Masbas125
August 8, 2011.



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

Caradiodoc
Aug 8, 2011.
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.

Tiny
Masbas125
Aug 9, 2011.
Wrong question sorry wrong I meant to ask I couldn't find a leak should I just change the hose anyway.

Tiny
Masbas125
Aug 9, 2011.
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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Caradiodoc
Aug 9, 2011.

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