Last post on Sep 08, 2013 at 7:45 AM
You are in the Lincoln LS
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Lincoln LS, Heating / Cooling, Sedan
Sep 02, 2010 (7:35 am)
'04 LS, 54000 miles. Bought new.
A/C decides to start blowing warm air, then after a few minutes, blows cool air again. Been to dealer once. Found nothing. Happened to my wife this morning as she was driving to work, except that the system just continued to blow warm air.
As luck would have it the car needs to hit the highway this weekend for a 5 hour drive to a wedding. Hate to do wit without A/C
A quite reliable ride so far except that I have no faith that the transmission will get me to 100,000 miles without a major repair. Been back to dealer 3 times for harsh shifting. All 3 times they did something with the computer software but a temporary fix at best.
Car heads into the dealer tomorrow to see if they can figure anything out with the A/C.
Thanks for any help.
#115 of 155 Re: A/C [jerseyguy1]
Sep 02, 2010 (9:32 am)
Could just be low on refrigerant - that's one of the symptoms. If not then it's either the control valve or the blend door.
Sep 02, 2010 (1:39 pm)
Sounds like DCCV (dual climate control valve), common problem on these cars, just had mine replaced on my '05
Sep 08, 2010 (10:32 am)
Thanks for the input. Just got back from an almost 600 mile trip. Car was flawless and the A/C worked properly--most of the time. Only had 2 or 3 incidents of it blowing warm air and then for maybe 15-20 seconds before it returned to cooling.
My wife needs her car all week so I will try to get it into the dealership next week.
FWIW, cruised it at about 70mph + for the trip and averaged 27mpg. The car has the V6 engine.
Sep 08, 2010 (1:25 pm)
There's a way to check the climate control but I can't recall exactly. Something with pushing buttons on the climate control system. Do a little internet searching.
#119 of 155 Re: A/C [jerseyguy1]
Sep 28, 2010 (5:44 pm)
Just had the same thing on my 2001. Started out as an intermittant problem now it's full time. Ran diag, by pressing off and floor button at the same time and then within 2 seconds press auto button. Counts up to 25 on one side and down on the other. Hard fail for 1947. Evaporator Discharge Air Temperature Sensor. On your back under driver side look up towards center box. Had one sensor high center with white sensor with two pin plug. Another sensor is 6 inches lower toward the driver seat. Swapped the two sensors by pulling straight out with some force. High sensor on mine is the evaporator sensor. Lower is driver side discharge. problem now with driver side temp. So from your description it sounds like the higher sensor is going bad. Cheap part from Ford! Let me know if this works for you.
#120 of 155 Re: A/C [planemech1]
Oct 01, 2010 (5:19 pm)
New part $32 from ford. replaced sensor everything now works great.
#121 of 155 LS Blows Cold. Or Hot. Or Both.
Nov 20, 2010 (2:09 pm)
Add my 2004 LS V6 to the list of psychotic climate control equipped cars. Back during the summer with the auto temp set to 72 and dual turned off, hot air blew from the passenger side and temperate air from the driver side. Air finally cooled and fan blew hard when temp set to 60, but when adjusted back up to 72 it blew hot at different temps from each side. Again even though the dual was turned off. The system seemed to fix itself after turning the car off then back on (rebooting?). But, the situation progressively got worse. Working, then not working, then working.
So, the car finally went to the dealer, who replaced the heater control valve for $500. It didnít work. Most recently: outside temp is 55, overcast. Auto climate control system set on auto, dual turned off, temp set at 72. Fan waits until car warms up (based on the temp gauge reaching the halfway mark) then kicks on, gently blowing cold air. Adjusting the temp up to 80, and the air starts to blow hard. And cold. Finally at 85 it warms up. Adjusted back down to 72 and itís cold again. It went back to the dealer, and they bled the system. Still no fix. Same symptomology as above.
Itís going back on Monday. First a new fuel pump at 65,000 miles. Now this. Otherwise the carís been great fun to drive, but Iím ready to relegate this to the ďtaking the dogs to the parkĒ car and find a new daily driver.
#122 of 155 Re: LS Blows Cold. Or Hot. Or Both. [displacedtexan]
Nov 21, 2010 (4:33 pm)
Really sounds like the DCCV or dual climate control valve, which sounds like the heater control valve you have replaced. When mine was replaced, the heat still didn't work and my mechanic replaced a fuse under the hood that usually blows when the DCCV goes bad.
#123 of 155 Re: LS Blows Cold. Or Hot. Or Both. [displacedtexan]
Nov 24, 2010 (12:05 pm)
When you select full hot or full cold it goes into overide mode. When you adjust to around 70 degrees and you don't get the temp that you are asking for on one side or the other, it's the temp sensor for that side. If both blow hot or cold its the top sensor that controls the air to both sides. The sensors are easy to change and cost $35 bucks from Ford. Sounds like you need a passenger side discharge temp sensor. Turn climate control full cold 60 Deg and see if both sides are cold and then full hot 85 deg and see if both sides blow hot. Adjust to 70 and see if you get a split in temp. Split tells you its one side or other discharge temp. If both blow wrong its the main one on the drivers side high.