Air Conditioner Problem?

Tiny
DENNISWADEBLACK
  • MEMBER
  • 1999 LINCOLN TOWN CAR
  • V8
  • 2WD
  • AUTOMATIC
  • 209,000 MILES
A/c intermittently will not come on - no fan, neither will the heat come on - next time it works fine- works sometimes for hours, then won't work for hours. What's the problem
Monday, August 30th, 2010 AT 12:54 PM

44 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
Your first step would be to wait for the next time it fails, go to the blower motor and test for power and ground arriving a the motor and that will tell us where to go from there.

These guides will help fix it

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

and

https://www.2carpros.com/articles/blower-fan-motor-works-on-high-speed-only

Please run down these guides and report back.
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Monday, August 30th, 2010 AT 1:05 PM
Tiny
FANCO
  • MEMBER
  • 1 POST
  • 1999 LINCOLN TOWN CAR
  • 4.6L
  • V8
  • 149,000 MILES
When I try to use the heater it does not warm up and temperature gauge says normal. Air conditioner does not work either, it blows warm. Coolant is full. Refrigerant. Trying to get flow of air is working just no heat or air conditioning. What could be wrong? Thank You. Chase
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Monday, July 13th, 2020 AT 1:36 PM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Try pulling fuse 6 and 19 with key on for sixty seconds then reinstall, it may reset the actuators. If that does not work then have it scanned for codes by a mechanic to see if actuators are getting power or not that may be the case. The blend door actuator may not be working or blend door could be broken as well.
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Monday, July 13th, 2020 AT 1:36 PM (Merged)
Tiny
MURPHMANTN
  • MEMBER
  • 1 POST
  • 1997 LINCOLN TOWN CAR
1997 Lincoln Town Car Signature, 145,000 miles, 4.6.

Last summer I had my A/C recharged and checked, and it worked fine for 3 or 4 months, and then the A/C stopped working and it would only blow heat, which I am unable to regulate. It blows straight heat, I can adjust the fan speed, but not the actual temperature. When I press the vent, defrost, outside temp, buttons it will only blow heat.
Sometimes when my control unit is off, heat will still blow from the floor vents.

I had the AC checked and everything appeared fine, they recommended I replace the cycle switch, which I did. I eventually replaced the HVAC unit, which also did not fix the problem.

I have been told that my "blower is stuck open" but if that were the case, why does it not blow cold air when I turn the AC on?

Is that the correct diagnosis? Or what do you think it would most likely be?
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Monday, July 13th, 2020 AT 1:37 PM (Merged)
Tiny
TEX
  • MEMBER
  • 4 POSTS
It's probably the blend door actuator. We're having the same problem with our 98 Towncar. The part costs $46 from the Lincoln parts dealer. You can run a system check for a code 24 or 25 that will confirm that you need to replace the blend door actuator.
1) turn car on and stabilize temp; 2) press the "off" and "floor" button at the same time; 3) let go and immediately press "Auto" and release; 4) you will see the LED display doing a segment check for about 20 seconds; all segments wil display simultaneously if no codes are found; 5) press "defrost" to exist the self test.

We had a code 24 show up on ours indicating that the blend door actuator needed replacing. Ford came out with a service bulletin #TSB 98-6-3 concerning this matter.

Hope this helps.
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Monday, July 13th, 2020 AT 1:37 PM (Merged)
Tiny
RAPIDRAY
  • MEMBER
  • 1 POST
  • 1997 LINCOLN TOWN CAR
Air Conditioning problem
1997 Lincoln Town Car Two Wheel Drive Automatic

My a/c works, there was a clicking at the dash, it went away, all OK. Next day a couple clicks, now when I set to the low of 60 degrees, as if I had it set to 80 degrees it only blows HOT HOT. I suspect
its the temp control or what ever opens & closes the air flow from the A/c or Heater. Were are these icontrols located, how do I get to them and were to get replacments. The car has 104 k miles, runs good,
want to trade soon as I get $$ t0geather. I have workrd on cars in the early tears but still can get around at 80 years young. Is it doable for me to make this repair. Thanks for your help. RAPIDRAY
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Monday, July 13th, 2020 AT 1:37 PM (Merged)
Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
Its the blend door actuator no good and need to be replaced

big job to do
have to remove the dashboard to do it
good luck
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Monday, July 13th, 2020 AT 1:37 PM (Merged)
Tiny
ELIZABETH CHALAS
  • MEMBER
  • 2 POSTS
  • 1997 LINCOLN TOWN CAR
Air Conditioning problem V8 Two Wheel Drive Automatic 215000 miles

according to my mechanic /friend he said clutch is working ac fuse okay Freon level is okay. Last year someone put too much ac Freon 2 x more but after 3 weeks he fixed this and since that time it just doesn't blow cool air he thinks it is electronics or a sensor any recommendation what to do? Awaiting your reply,

Elizabeth - this site rocks!
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Monday, July 13th, 2020 AT 1:37 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
When you turn the AC on -Do you hear the clutch engage the compressor?
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Monday, July 13th, 2020 AT 1:37 PM (Merged)
Tiny
ELIZABETH CHALAS
  • MEMBER
  • 2 POSTS
Yes, it is working but cold air is a warm air. My friend said that everything works except some the air is not converted to cold air. He also said that he thinks this is a wiring electrical problem and it would take a lot of time to check it.

Could this be a sensor?
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Monday, July 13th, 2020 AT 1:37 PM (Merged)
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,513 POSTS
Hello,

This sounds like one of two things is happening. First while the ac is running grasp the outgoing line at the firewall (low side) to see if it is cold. If not with a full charge the seals inside the compressor could have gone bad and the compressor will need to be replaced.

https://www.2carpros.com/articles/replace-air-conditioner-compressor

If it is cold that it is a temperature blend door issue not closing and will need to be replaced. Here is a guide for that.

https://www.2carpros.com/articles/replace-blend-door-motor

Here is a general guide on the ac system not working which can give you an idea how to go about finding out the problem as well.

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

Please run some tests and get back to us so we can continue helping you.

Cheers, Ken

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Monday, July 13th, 2020 AT 1:37 PM (Merged)
Tiny
CCELLNER
  • MEMBER
  • 5 POSTS
  • 1997 LINCOLN TOWN CAR
1997 Lincoln Town Car

the heater on my lincoln towncar will not blow hot air. The vents open right but the air is cold
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Monday, July 13th, 2020 AT 1:37 PM (Merged)
Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
Do you have automatic climate control or dual auto climate control.
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Monday, July 13th, 2020 AT 1:37 PM (Merged)
Tiny
CCELLNER
  • MEMBER
  • 5 POSTS
Automatic climate control
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Monday, July 13th, 2020 AT 1:37 PM (Merged)
Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
Turn on ac and go from full cold to full hot do you notice any temp change at all? Have you tried manual heat mode?

With fan off turn they blend from cold to hot do you hear a door moving at all?
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Monday, July 13th, 2020 AT 1:37 PM (Merged)
Tiny
CCELLNER
  • MEMBER
  • 5 POSTS
I put on floor heat and turned fan all the way up. It still stays cool and I don't hear the blend door moving.
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Monday, July 13th, 2020 AT 1:37 PM (Merged)
Tiny
DW101
  • MEMBER
  • 1 POST
  • 1997 LINCOLN TOWN CAR
  • V8
  • 2WD
  • AUTOMATIC
  • 110,000 MILES
Blows hot air all the time
ran the diagnostic process press the off and floor button then the auto button
code 30 displayed
what doe this mean
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Monday, July 13th, 2020 AT 1:37 PM (Merged)
Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
Alirght one final thing is get car hot. And carefully go under the hood after you just turn it off and feel the heater core hoses right at the firewall/bulkhead. Are they both hot? Both warm? One warm one hot? One cold one hot? Both cold?
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Monday, July 13th, 2020 AT 1:37 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,709 POSTS
Code 30 indicates the automatic temperature control sensor has shorted.
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Monday, July 13th, 2020 AT 1:37 PM (Merged)
Tiny
CCELLNER
  • MEMBER
  • 5 POSTS
Both hoses are hot
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Monday, July 13th, 2020 AT 1:37 PM (Merged)

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