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I have a 2004 LSE and I am having a problem with my A/C. Here's the deal......My A/C use to be ice cold to the point where you could not drive around with it on high for to long or you would freeze. One day it started to get warm and them blow hot out of the passenger side vents and then eventually all the vents. I took it to the ford dealer that day and they changed the DCCV under warranty and said it was good to go. When I picked it up the A/C did not seem as cold as before and at times it would only blow cool(almost warm) out of the vents. I brought it back to the dealer and they said they could not find anything wrong with it. After some b@tchin and moaning they looked at it again and decided to suck down the system and recharge it. It still does not seem right.
One question I have that maybe some of the lincoln techs on here could answer is, on average how cold should the temperature out of the vents be on max A/C. I bought one of the A/C thermometers and the temperature coming out of my vents on average is 48-50 degrees or higher. At times it has dropped to about 44 degrees but it will then raise back up to about 50 degrees sometimes reaching as high as 55. I never did measure the temperature prior to the DCCV being replaced. The ford dealer has pretty much told me that everything seems fine to them and that they do not know what could be wrong. They suggested I bring my car to an actual lincoln dealer. It is frustrating as I said because prior to the DCCV being replaced my A/C was nice and cold and I never had any problems. it now seems that every other car I get into the A/C is much colder then my lincoln. Is there something that the dealer is missing. Is there any tests i can do? I was also wondering if maybe the DCCV they put in could be faulty. I am at my wits end and throw myself at the mercy of the members on this board. Any help or suggestions would be appreciated. Sorry for such a long post.
Posted by: joegr
Sounds like the DCCV that they put in is not closing all the way. Set the Air to 60 and then feel the heater hoses under the hood. Are they getting hot? (They shouldn't if the DCCV is closed like it is supposed to be.)
Posted by: acedoy
I will try that. You are talking about feeling the hoses that connect to the valve right?
Posted by: joegr
Yes the ones between the valve and the heater core.
Posted by: acedoy
I checked the hoses after driving a bit and they seemed hot. I also did the DATC self test and it came back with code 2798. I pressed defrost which I believe clears all the codes and then tested it again a short time later. I got the same code of 2798 which according to the manual is: Driver Coolant Control Valve Circuit Short to Ground. I checked the connection on the DCCV and it appeared to be connected properly. Should I suspect the new DCCV the dealer put in to be defective?
Posted by: joegr
Yes, that's the code my 04 had when it failed. (Of course, it's possible that it is wiring or the climate control module, but the most likely is the DCCV itself.) Find a real Lincoln dealer, they will do the correct troubleshooting steps to determine it, or take a chance and replace the valve yourself.
Posted by: 97stscaddy
Most AC systems should blow about 40°F at the vents.
Ive read about the DCCV problems plenty of times and this seems to be how they start out. And my car is starting to show some of the same symptoms as what Ive read so I plan to be in the same boat before too long. Hopefully it'll last through the summer.
