No air blowing from vents?

JACKHAK

MEMBER
2003 FORD TAURUS
6 CYL
FWD
AUTOMATIC
173,000 MILES

The 2 front defroster blowers stay at same speed even when on the highest, the interior side windows fog up and ice over when it's below 20 degrees outside, we live on NH so it happens alot. We've had the car all this time without a problem

4 Replies

BMRFIXIT

MECHANIC
19,053 POSTS

Lets replace the air cabin filter.

Open hood Remove the right side cowl vent screen. Remove the screws and the water shield. Remove the pollen

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Saturday, February 6th, 2010 AT 7:06 PM

JACKHAK

MEMBER
2 POSTS

Thanks so much! We did what you said, the filter was filthy, filled with dirt, debris and many acorns. Will see how it works with the cold weather tomorrow morning. At least the filter is clean regardless.
PS, we appreciate your professionalism and timely response. We will for sure advertise for you by word of mouth in our large extended family and friends.

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Sunday, February 7th, 2010 AT 9:19 PM

JFH 423

MEMBER
1 POST
2002 FORD TAURUS

The air conditioner blows out cold, but it will not blow through the dash vents or the back seat vent. It blows through the defroster and can be switched to floor vent, just not dash or dash/floor. Any help would be appreciated.

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Wednesday, July 28th, 2021 AT 12:18 PM (Merged)

WRENCHTECH

MECHANIC
20,758 POSTS

The mode selection is done through a series of air doors that are operated by vacuum. When there is either a partial or total loss of vacuum, the system will default to either defrost or on some vehicles, heat. Acceleration can also have an effect on the doors for the same reason.

Check out this guide

https://www.2carpros.com/articles/air-vents-stay-in-the-defrost-position

Look under the hood for a small black plastic hose coming through the firewall. Follow it to the vacuum source looking for any breaks, cracks or leaks. Also, follow any other lines that branch off because they may go to a vacuum reservoir (storage tank) and a leak there will cause the same problem. Using a vacuum gauge to determine if you have full vacuum at any given point is the best way to find it. You can cut into the line anywhere and splice it back together with a piece of vacuum hose. Find the broken line, you found your problem.

Cheers!

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