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Old 01-24-2011, 12:21 PM   #1
Join Date: Jan 2011
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2002 Wrangler X Ventilation

When the fan is on, only the defroster blows air. Switching to the floor vents or the dash doesn't change it. Any suggestions? The problem developed gradually.

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Old 01-24-2011, 12:56 PM   #2
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Pull off the knob, most likely cracked. New ones can be purchased at quadratec.

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Old 01-24-2011, 06:56 PM   #3

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most likely you have a leak in a vacuum line, look along your intake right below the throttle body. They tend to come loose and fall off right there, you can push it back on then maybe put a small ziptie around it and you'll be good to go.

Look around number 5 in the pic. If that is connected, then just follow that line looking for any cracks or loose connectors

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Old 01-25-2011, 02:23 PM   #4
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Hardermods thank you

It was the vacume hose alright. Thank you so much!!! It was where the vacumn line connects to the box (number 8 in the diagram) what is the conponent No. 8?
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Old 01-25-2011, 04:34 PM   #5

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That is a vacuum reservoir, Engine vacuum is stored in the vacuum reservoir. The stored vacuum is used to operate the vacuum controlled vehicle accessories during periods of low engine vacuum such as when the vehicle is climbing a steep grade, or under other high engine load operating conditions.

That is another common problem area, due to the battery being right above it, over time acid from the battery will leak down that way and corrode the hoses
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