1999 Ford Taurus A/C Out

Question edited for clarity.
Question moved to correct year make model category.

Check the fuses and relays.

Ford Taurus (2000-2007) fuses and relays

https://fuse-box.info > ford > ford-taurus-2000-2007-fu...

2003 - Here you will find fuse box diagrams of Ford Taurus 2000, 2001, 2002, 2003, 2004, 2005, 2006 and 2007, get information about the location of the fuse ...

2003 Ford Taurus fuse box diagram - StartMyCar

https://www.startmycar.com > Taurus > Fuse box
The 2003 Ford Taurus has 2 different fuse boxes: Passenger compartment fuse panel diagram. Power distribution box diagram. * Ford Taurus fuse box diagrams ...

Ford Taurus (1999 - 2007) - fuse box diagram - Auto Genius

https://www.autogenius.info > ford-taurus-1999-2007-f...
Jul 2, 2018 - Ford Taurus (1999 - 2007) - fuse box diagram. Year of production: 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 ...

maybe idle control sensor

Bad neutral safety switch Karen.Could be this. Neutral Safety Switch 1999 Ford Taurus 6 Cylinders 3 0L EFI AutoZone com

You need to clean the IAC again and also the throttle valve and bore, use only CRC brand Throttle body cleaner. After they are thoroughly cleaned disconnect the battery for 5 min's and then drive the car in varying condition for a few days. If that doesn't cure the issue you have more serious problems and will need a scan tool to look into the readings from the MAF, TPS and ECT sensors. High idle cold start is normal then slowly dropping after a few minutes. I assume you never had a check engine light. Correct?

Well, YES, NO, and SORT-OF???

Your refrigerant evacuating and and recharging skills might be helpful, however, you cannot capture the R-134A refrigerant using the same equipment that you use on refrigerators unless you have empty refrigerant tanks to use. The refrigerants are not compatible with each other.

Then, yes, it is possible that your A/C clutch is slipping. You can verify this by listening to the sound of the compressor. You can usually hear the clutch making a grinding sound. There will usually also be a bunch of rusty-looking dust around the area of the clutch due to the metal tearing off of the clutch surfaces.

Then you need to decide if you want to replace the clutch assembly or the entire compressor. If the clutch assembly is all you need, then it can be replaced without any type of refrigerant recovery needed. It is also a whole lot cheaper to replace than the compressor (see picture and link below).
However, the clutch can be pretty tough to replace without the special tools needed - especially if you have never done one before.

Clutch listing for AC clutch at AutoZone

What engine size? 3.0?

The most common reason for the compressor not engaging is low refrigerant pressure. The ac system has a safety switch that will not allow the compressor to engage when there is not enough refrigerant pressure because the the refrigerant carries the compressor lubricant throughout the system. Have the system checked for proper charge. You probably have a leak. The fan is probably a separate issue.

the setting of the idling must be wrong. try this... at first you start the engine, wait till it gets hot then start lowering the idle in the normal rpm. this will sure work. hope this helps

Just finished fixing my daughters 1999 taurus heat. It would blow warm only when running down the road. At idle it blew cold. I started with replacing thermostat, and water pump because they are the easier fix. Still did not help. Then I replaced the heater core. A daunting job but not that hard to move the dash slighly out of the way to replace. There is a good write up at tarusclub.com. After that, heat was better but at idle, it would still blow cool sometimes. Researched and found answer. Park car on the steepest hill you can find with front of car up. Start car and take off reservoir cap. Let car warm up and keep rpms about 1500. After a while the fluid will come running out of the car and all over the place but it will bring air bubbles with it. Reduce rpm, add more fluid and repeat about 3 times. It will make a mess but after that, the heater works perfectly. We get heat long before the temp gage indicates any and it never blows cold unless you lower the temp.

ok firstible who recharge the system? you or an autorepair? or are you a mechanic? if you say the pressures are ok, what are the pressures at? and sound to me like the system is overcharge, please answer my questions so we can comunicate better, are you just a car onwer, or are you a mechanic because i see on you ranking than you have it high, that way we will comunicate better,