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A/C problem?

Tiny
MAXEYBA
  • MEMBER
  • 2005 LINCOLN TOWN CAR
  • V8
  • 2WD
  • AUTOMATIC
  • 95,000 MILES
My '05 Lincoln Town Car ac seems to work ok first time each day but not as well on succesive start ups when running errands. Last Summer was when I first noticed it (Bought the car in Winter of '09). Took it to my mechanic and he said he put.3 # of R134 and gave me instructions on climate control settings for opitimal cooling (manual overide to dash only, fan speed @ midrange, and recirculate). I have found this to be of very little help. Here are some of my other observations. Cooling is better if "recirculate" is delayed for a few minutes on initial running, and actually reduces cooling performance on subsequent later restarts. I have done some research on this mdel and have found it be notorious with regard to "Blend Door" problems. Anecdotally, I have heard what sounds like doors/flaps moving, shutting or something for quite sometime after the engine is off. In looking around under the dash just to see if anyhting looked amiss, I noticed the aluminum pipes, which assume are part of the evaporator component, were some blazing hot I couldn't even touch the. That doesn't sound right, and I know that they couldn't possibly be that hot whenb the engine and ac is first started each day(again, that's when cooling is at best). So, could there be a problem with the evap? I couldn't see the cooling fins, so I don't know if they are clogged or not. Finally, what other checks can I, a layman, do before I just take it somewhere? I know low and hi pressure gauges can tell me a lot but I don't have them, and and am unsure I would feel confident diy even if I did. Is there a way to do a climate control code search as with some other vehicles by pusing 2w setting simuntasneously and waqiting to see waht digital code appears? Thank you so very much, in advance. Bill
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Thursday, July 28th, 2011 AT 8:12 PM

19 Replies

Tiny
FIXITMR
  • MECHANIC
  • 9,990 POSTS
The system could be overfilled. This guide will help us fix it,

https://www.2carpros.com/articles/car-air-conditioner-not-working-or-is-weak

Please run down this guide and report back.
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Friday, October 21st, 2011 AT 1:19 AM
Tiny
S. ELGIE KAURA
  • MEMBER
  • 1 POST
  • 2005 LINCOLN TOWN CAR
  • V8
  • 2WD
  • AUTOMATIC
  • 60,000 MILES
Ac will work fine for about 30 minutes; then it will no longer put air thru the vents: either cold or hot, although it sounds as if the ac motor is working. We have spent over $2,700 at a lincoln dealer trying to have it fixed where they replaced the accumulator, compressor, cond asy, tube/com(?) & Related, & fan motor and we still have the same problem. Took it to a local lincoln dealer and the problem still persists and they cannot fix it either. Any suggestions?
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Tuesday, July 14th, 2020 AT 10:38 AM (Merged)
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
After spending 2700 I would be in Court, or at least threatening the owner of the dealership with it. Lincoln has more test gear than I do, but they have replaced all but the control unit and interior sensors! I dont remeber if this test works on 05's or not but try this and write down any codes when the A/C fails.
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Tuesday, July 14th, 2020 AT 10:38 AM (Merged)
Tiny
EDENCOOMER
  • MEMBER
  • 1 POST
  • 2003 LINCOLN TOWN CAR
Air Conditioning problem V8 Two Wheel Drive Automatic 110000 miles

I started having problems with the a/c not getting cold right away and now it doesn't get cold at all. The freon is okay but compressor doesn't come on. What would cause this?
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Tuesday, July 14th, 2020 AT 10:38 AM (Merged)
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
How do you know the R134a is fully charged? This guide can help us fix it

https://www.2carpros.com/articles/car-air-conditioner-not-working-or-is-weak

Please run down this guide and report back.
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Tuesday, July 14th, 2020 AT 10:38 AM (Merged)
Tiny
PATUSA
  • MEMBER
  • 6 POSTS
Dear all experience people,
I have 2003 Lincoln Town Car, it's been good with me since I had it brand new but last month the AC had problem and I already try the best to fix it but the compressor is still not engaging, if I connect directly pin 1 and pin 5 of the relay then the compressor was engaging and AC cold but I can't stop the compressor until turn off the engine. I did drove 2 hours in the weather 100F in California to get home. I parked and open the hood OMG the AC line was frozen and cover by the ice so I have took out the wire then the compressor stop working.
Here is all step I did try:

1. Replace 2 switch (low and high pressure)
2. Replace AC relay 204
3. Replace AC temperature sensor (at the firewall near by the last spark plug on bank 1)
4. Full re-charged Freon
5. Replace the climate control
6. Replacement the heater actuator blend door
7. Replacement the panel/defrost actuator blend door
Any body experience with that issue. Please, help me out. Thanks all
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Tuesday, July 14th, 2020 AT 10:38 AM (Merged)
Tiny
CARADIODOC
  • MECHANIC
  • 33,871 POSTS
Hi PATUSA. You need to start a new question specific to your vehicle, and please be sure to list the engine size and mileage. Unlike other web sites where anyone can post a reply, these were conversations between just two people. They are now listed as having received a reply, so they go "off the list" and none of the other experts are going to see your addition or have a chance to reply. That won't get you the help you need.

When you list the symptoms, specify which hose has the frost forming on it. That occurs at the point where the liquid is turning to a vapor. You want that to be in the evaporator in the dash. If the system is low on charge, the cooling, (and frost), will occur under the hood in the hose coming in from the condenser. If the system is over-charged, which is worse, the cooling will occur under the hood again, in the hose going to the compressor.

Be aware too that part of how the system works is by forcing the refrigerant through a tiny controlled restriction. If you watch that hose under the hood right after you start the engine, if the frost starts to form in one small area, rather than the entire hose, there is a restriction at that point.
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Tuesday, July 14th, 2020 AT 10:38 AM (Merged)
Tiny
PATUSA
  • MEMBER
  • 6 POSTS
There is no power at the gray/white wires when turn on the AC.
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Tuesday, July 14th, 2020 AT 10:38 AM (Merged)
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,513 POSTS
With the key on how many terminals of the relay are getting power? Relay removed
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Tuesday, July 14th, 2020 AT 10:38 AM (Merged)
Tiny
ZIBLISKI
  • MEMBER
  • 1 POST
  • 2003 LINCOLN TOWN CAR
  • 95,000 MILES
No air conditioning, cycles off and on, won't stay on. Worked fine last week but
kept getting warmer until it quit working. Pump runs 3sec. And stops 3sec. And stops. If it gets low on Freon will that cause it to cycle. What kind of Freon does it take. Can I add to it without using gauges.
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Tuesday, July 14th, 2020 AT 10:38 AM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Actually this is auto tempcontrol and really needs to see if anything is wrong with it other than the Freon. See pic for instructions on how to get codes form hvac unit. Then get back to us
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Tuesday, July 14th, 2020 AT 10:38 AM (Merged)
Tiny
EARLEARL2010
  • MEMBER
  • 2 POSTS
  • 2003 LINCOLN TOWN CAR
AC takes about five to eight minutes to start cooling
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Tuesday, July 14th, 2020 AT 10:39 AM (Merged)
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
Someone needs to do a diagnostic on it and get readings on the pressures for both high and low side.
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Tuesday, July 14th, 2020 AT 10:39 AM (Merged)
Tiny
PATPDP
  • MEMBER
  • 2 POSTS
  • 2003 LINCOLN TOWN CAR
Air Conditioning problem
2003 Lincoln Town Car V8 Two Wheel Drive Automatic

the a/c is cold when idling or driving slow but at higher speeds the air gets warm. I have also noticed that at higher idle speeds when in park the clutch will stop turning.
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Tuesday, July 14th, 2020 AT 10:39 AM (Merged)
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Have freon charge checked maybe low
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Tuesday, July 14th, 2020 AT 10:39 AM (Merged)
Tiny
PATPDP
  • MEMBER
  • 2 POSTS
Thank you
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Tuesday, July 14th, 2020 AT 10:39 AM (Merged)
Tiny
SPRINGBROOKS
  • MEMBER
  • 1 POST
  • 2001 LINCOLN TOWN CAR
  • 4.6L
  • V8
  • RWD
  • AUTOMATIC
  • 104,712 MILES
When you turn on the air Conditioner, no cold air comes out. Blower works however. It has electronic control system. I haven't heard compressor kick on. The car idles very quiet. Don;t know if it compressor or what. Please advise. Thank you.

Also, my turn signals doesnt work. All other lights works good.
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Tuesday, July 14th, 2020 AT 10:39 AM (Merged)
Tiny
FREEMBA
  • MECHANIC
  • 1,152 POSTS
Since it is not recommended for non-certified persons to attempt A/C repair, and to save time and money in the long run, have a a/c shop to check the freon level in your a/c system. If the level is low, suspect a refrigerant leak.
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Tuesday, July 14th, 2020 AT 10:39 AM (Merged)
Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
We need to start with checking the Freon levels and make sure the system is properly charged and has no leaks.

Here are a couple guides that will help with this:

https://www.2carpros.com/articles/re-charge-an-air-conditioner-system

https://www.2carpros.com/articles/car-air-conditioner-not-working-or-is-weak

Once we know what the pressures are we will have a better idea on what direction to take but please see below for a chart that will help with figuring out if the pressures are correct.

Please run through getting the pressures as that is the first step any time the A/C is not blowing cold with or without the compressor running.

If the pressure is low, then the compressor will not kick on, but it could blow warm before the pressure gets low enough to trip the low-pressure switch.

Please let us know what you find. Thanks
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Tuesday, October 19th, 2021 AT 5:03 PM

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