If it is cold in the rear, that eliminates the "freon" part of the system. (It apparently has enough freon and the compressor is apparently working.)
So that leaves you with a blend-air door problem on the front A/C unit. That may be a blend-air door actuator, a broken blend-air door, or a faulty control head. (Proper diagnosis required)
SOURCE: 2001 merc sable blows only from bottom vents
the selection is done by a flap in the duct which is controlled by a rod or vaccum . the flap may be stuck, the rod bent broken or disconnected.vaccum blocked, crimped or disconnectd. the glove box comes out, that might help access
SOURCE: A/c not working
sounds like you a have a problem with the blend door. could be a bad blend door motor or something is stuck keeping it from moving.
SOURCE: cold air only comes out of defrostervents not dash panel vents
It sounds like you have a blend door malfunction. Its hard to know the extent without opening your A/C system and looking at the belnd door system. It might be as simple as taking some dash pieces off.
SOURCE: Cold air coming out of heater
Check operation of the heater core coolant control valve and associated remote control mechanism.
SOURCE: I have a 2002 mercury villager that the air
I HAVE A PROBLEM WITH THE AIR CONDICION FAN THE FUSE BLOW OUT EVERY DAY :(
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