Last post on Oct 28, 2013 at 1:21 PM
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Lincoln Town Car, Auto Body, Engine, Suspension, Sedan
#896 of 1123 ATC gone mad on LTC 1997 Signature?
Sep 21, 2009 (7:54 pm)
I have a Lincoln Town Car 1997 Signature Series with Automatic Temperature Control (ATC). Recently, the ATC has gone mad: it switches to maximum heating, no matter the temperature setting, also on A/C. The A/C itself works fine (I can hear it kicking in, the system is pretty cold under the hood).
The dealership suggests it is likely the actuator motor (and offers a fix for ~$200). However, the motor seems to be just fine: when the ATC works correctly, I can hear the valve moving and feel the air changing the temperature while I change the temperature setting up and down stepwise. When the ATC does not work correctly (max heating), the following diagnostic procedure seems to reliably solve the problem: turn the ATC off, press the floor and off buttons concurrently, press the auto button within 2 seconds. The diagnostics are run, and I get the 25 (temperature blend door actuator) and 115 (engine coolant temperature sensor) error codes. After the blue button is pressed, I restart the engine, and the ATC works fine.
The max heating issue seems to be triggered by the car being started while it's cold and the ATC is set to any temperature above the outside, but it's still pure guesswork, as it wasn't really cold here yet, and it occurred just a few times and I wasn't observant enough to be sure. Could it be the control unit rather than the actuator? There's another issue with the ATC that makes me suspicious: when I switch between imperial and metric units, the ATC would sometimes ignore the change, and sometimes the display flickers between F and C. Is it something I can safely ignore (in the sense it won't break completely and cook me up in the cab or deprive of any ventilation)? I'd rather spare 200 bucks if resetting the ATC with the diagnostic test is enough to make it work.
Thanks in advance for any hints and comments.
Sep 30, 2009 (8:59 am)
I have a 96 Lincoln Town Car with the digital dash. Today the dash went blank while I was driving and I could smell something burning. Fuse 18 (10 amp) was blown. I replaced the fuse and it blew again along with a burning smell. Pulled down the cover under the dash and could not see where the smell was coming
from. Fuse is for instrument cluster, clock,A/C control module, radio, & diagnostic connector.
I temporaly replaced fuse with 30 amp; radio and A/C came on but could smell burning so I pulled the fuse. Dash did not come on. I can not afford another car. Does anyone ever had this problem. Thanks Bob
#898 of 1123 Re: ATC gone mad on LTC 1997 Signature? [lampu]
Sep 30, 2009 (11:39 am)
The blend door actuator is defective. This is a $49.95 motor that is under the dash that cost from $600.00 to $900.00 to replace because of the labor involved in making the repair. If your dealer has a way to do it for $200.00 have them do it. From messages on this board and other sites it appears that the dashboard has to be removed in order to replace the part.
#899 of 1123 Re: ATC gone mad on LTC 1997 Signature? [lampu]
Oct 14, 2009 (8:24 pm)
I had the same problem with my 1997 town car sig .....it is the blend door motor that is failing.....I would run the self diagnostic and it would reset itself. did that for about a year but it slowly got worse. sooner or later you will have to replace the blend door motor, about a 60 dollar part but the dealership wants an arm and a leg for labor. did it myself in about 3 hours..... you can find great directions here on the web. one thing you might do is not run your heat or a/c on automatic, when its on automatic it keeps switching from cold air to hot and works the blend door motor that much more..........Good Luck
#900 of 1123 Re: 2000 Town Car Memory Seat [oldhouseboater]
Oct 15, 2009 (7:01 pm)
did you ever find out the answer? My 02 Town Car started same thing. Thanks, Tony in PA
How do I reset the drivers seat so that it stays where I position it. When I take the key out of the ignition it goes to the full back position! This has worn out the forward/reverse worm gear in the gear box. You cant buy the gear and they want to sell the complete seat frame assembly at 357 bucks. I am handy and rebuilt the gear but the normal person can't do this. I put a switch in the feed wire but there has to be a better way. The procedure using the remote that is in the owners manual doesn't work. The dealer gave me a blank stare.
#901 of 1123 Re: Wet Floor mats [izaclown1]
Oct 22, 2009 (8:13 pm)
I too have the wet floor syndrome. But I noticed today, just took over the car from my wife, that it needs to be raining really hard before the floor gets wet.
I am curious about your mass air flow and climate control problems though. I have noticed that if I put the temp on 85 or 90 it blows hot air but anything below 82 it is about like haveing outside air come in. It does not freeze you but then it is not winter yet either. Could I have the same problem you had and is it a cheap fix?
#902 of 1123 car drifts
Oct 30, 2009 (5:00 pm)
ihave a 1993 lincoln town car sig. when i let off the gas the car drifts to the left and when i give it the gas it drifts to the right. the car has 107000 miles on it and just put in shocks.
#903 of 1123 1994 town car
Nov 02, 2009 (4:45 am)
the message in the message center reads CO what does this mean and what is the fix.also fuel gauge only has top end two bars and low end two bars readings . what does this mean.Owners manuel is of no help.
#904 of 1123 Blower Problems-98 Lincoln Town Car
Nov 03, 2009 (3:20 pm)
I've been trouble-shooting problems I've been having with my blower motor and am at a loss. My air randomly will not start up and I can not figure out why. Listed below are what I have tested to far.
1. Blower Speed Control Module- Knowing that these were notorious for having bad solder problems in the '98's I checked here first. Once removed, the BSCM looked almost as if it were new. No problems aesthetically.
2. Voltages- the line into my blower motor is receiving 14 volts when on high, meaning that there doesn't appear to be any problems upstream (BSCM, wiring, etc.)
3. The Blower Motor- Once I removed it from it's housing I tried connecting it up and everything worked fine on it. There did not appear to be anything in the housing itself that may be obstructing it.
Where I am confused is that the blower seems to work just fine for a while, then all of a sudden won't want to turn on. It always happens once the engine has been turned off (won't ever quit in the middle of working). I have also noticed what seems like a metallic grinding sound that comes from the engine when I turn on the air at first. I thought it may be the compressor, but I checked it and it's not trying to kick on when I get the sound (the A/C was off also).
Does anyone have any ideas of what I should be looking at?
#905 of 1123 Re: Blower Problems-98 Lincoln Town Car [zmgoshert]
Nov 04, 2009 (10:55 am)
I have a large fleet of Ford products (Mostly '97 to '03 E Series vans), and I own a 99 TC Cartier.
Over time we have had blower motor problems with this fleet where the rotary switch would wear out (obviously not equipped with ATC), the connection plug at that switch would o/heat melt the plug end allowing the blade connector to expand from the heat and disconnect.With the molded plug end melted it could not hold the blade in contact with its mating part. Disconnection.
BSCMs that have thin wire coils to produce the various speeds of the blower motor, can have that crimp between that thin wire and the base connector develop some fine corrosion build up. It may be hard to see yet that wire is loose at the crimp.
I've seen this more so in 80's - 90's AC equipped Chrysler Products where the loose connection would even spark/glow causing more heat than it was designed to withstand.
Upon replacement of any/all electric switches or connections involved with our Ford Heat-AC Systems, we use dielectric grease during reassembly.
Hope this helps.