Front air vents not blowing - 1986 Mercury Sable

are you talking about the overhead vents? They only recirculate air without the a/c on.

could be blend doors in heating duct work.

I recharge unit for your ac

you have a vacuum leak in the selector switch for front heat explorers had similar problems

if both vents are blowing air in general then you may need to get your air conditioner recharged, but if the front vents aren't blowing at all then you may just have a jammed vent flap and you can fix that from under the hood next to the blower motor. check you rowners maual for the exact location

When I turn on the heat in my 2004 mazda mpv the front air vents blow heat but the rear air vents are blowing cold. I have adjusted every setting is there something I am overlooking.

maybe blower motor for front is getting weak

its the blend door behind the glove box. I had the same problem

had this trouble in a dakota it was a blend door in the heater unit. had to remove entire dash to repair

Hello according the the manual, the back vent are to blew cold air only..the fronts vents are suppose to the entire car...