Heat and AC vent problem.

Check the fan/fans to see if they are working and the fuses. These are the usual causes of a bad vent

Is the air inlet to the blower blocked, check it.

i found lose vacuum line and started geting cold air front was working until my car start staling and check engine light came on car turn off code po172 ....some were is

You might have vacuum leak at anywhere. Check the vacuum pump and solenoid. Unplug and plug the vacuum feed to the solenoid else replace the solenoid. You can find necessary ford AC parts at http://www.discountacparts.com/Ford-AC-Parts/

Make sure you have the heat selection set all the way to heat. In Ford and Dodge vehicles, when you select Defrost the AC compressor actually kicks in and if you have the temperature selection set to the cool side it will push cold air to defrost your windshield.

perished vacumn pipe feed to the switch control?'

check behind the climate control its either vacuum operated or cable operated when you switch it from floor to defrost.its probably seized up or broke....

If you have the heater directed to the windshield, the AC will turn on. Move the control away from defrost.

headlights won't turn off.. 1998 fors tuarus