Schleprock

Hi to all.
I have a 2000 Ford Taurus SE OHV 3.0. 186,000 miles.

I turned the air conditioner on and the cold air only blew out from the defroster vents on the top and side of dashboard but not from the dashboard vents that face the passengers. Any ideas? I will check the fuses tomorrow but I was hoping for any feedback as to what it might be. Thanks for any response.
Cordially,
Schleprock

Bert

That would be a vacuum leak. Check under the hood since that area is subjected to heat and sometimes the hoses will get knocked loose. There's a reservoir, hoses and check valve in the circuit there.

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Bert

Schleprock

Thanks for the quick reply Bert. I will get on this info asap.
Thanks so much for your help.
Schleprock

tomw

The mode selector defaults to defrost mode when it does not have any vacuum to operate the diaphragm that moves the paddle around inside the plenum. Better to see in the winter than not, more or less.
If the selector valve is leaky, the hoses have a leak or the vacuum reservoir springs a leak, there may not be enough engine vacuum to operate the selector. If it were to slowly swing to defrost when you accelerate, you may want to look at the vacuum reservoir check valve. Manifold vacuum drops when you step on the gas, and if the check valve is not functional, the vacuum in the reservoir will deteriorate also, allowing the paddle to move to defrost.

Schleprock

Thank you for your reply. I appreciate all the info and help provided.
Cordially,
Schleprock