Air Conditioner blowing out hot air on 2007 Ford Taurus

The air conditioner on my 2007 Ford Taurus was working just fine one day. The next day it started blowing out hot air. The air coming out seems to be the same temperature whether I have it set to A/C or the hottest setting on "heat". The only way it won't blow hot air is if I turn the blower off entirely. Any help would be appreciated!

by in Indianapolis, IN on May 25, 2010
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3 answers
ANSWER by , May 25, 2010
Do you hear the air conditioning compressor switch on (with the engine running) when you turn on the air conditioning from inside the car. Get a friend to turn on and off the air conditioning while you listen with the hood open engine running you should hear a clicking sound on and off each time the a/c is cycled on and off or the a/c clutch is not locking up the compressor. This may be due to many things (bad clutch, bad compressor, no power to controls or compressor clutch) but it could be a sign of low charge the system has a low pressure switch which prevents the system from being energized if the system has low refrigerant charge. By protecting itself it prevent catastrophic failure of the compressor and ensuing damage to the rest of the a/c system if the system looses it charge. You will need to have the system checked out by someone experienced in air conditioning work who will attach pressure gauges to your car and see if the refrigerant pressures are OK.
ANSWER by , May 25, 2010
sounds like you lost your freon. take it to a shop and verify. they will add a dye to determine the leak and give you a bid for repair. Roy
ANSWER by , June 27, 2010
my ford tauras does the same thing,,i undo the neg. battery cable for like 15 minutes,,,and it resets,,,worth a try.