Re: 99 escort a/c problem
As far as I can remember , the flap is inside heater box and is operated either by cable , vacuum or motorized valve . You usually can get access from under dash , depending on which side it is on to check operation or manually set as a temp. measure . Sounds like you may have knocked off a vacuum hose , or outer cable retaining clip or a wire , which ever is applicable , whilst installing set . Suggest removing radio and double checking .