1994 Town Car outside temperature shows -39 on the dash gauge. Air conditioner will not blow cool air but the heater works fine. How can this be fixed, or can it?

Asked by Aug 20, 2013 at 10:55 PM about the 1994 Lincoln Town Car Signature

Question type: Maintenance & Repair

Like I said the dash sensor board shows the outside temperature at -39 degrees. Does
this cause the AC to not work? I know the heater works fine. Is it fixable? And if so, how?

3 Answers

116,285

The ambient temp sensor is most likely defective or you have a broken or shorted circuit in the sensor wiring. Most auto repair shops have the tools to fix this. The climate control system is not connected to the ambient temp sensor for the outside temps, it has it's own sensor just under the dash pad. If your A/C is not operating the A/C system could be low on refrigerant so the compressor will not engage if the low pressure switch is not closed due to low pressures in the A/C system. Have your A/C system checked out and serviced if needed.

4 people found this helpful.
27,975

YES! The Ambient Temperature Sensor is tied directly to your EATC unit. (I just perused the schematics) Yes it can effect your AC (since the lowest temp setting is 60.) There is also a Sun Load sensor (in the dash) As stated by my associate, it is likely that you have an open in either the sensor or the wiring that is causing your -39 degree reading. It is also possible that you have a freon leak preventing the AC from operating but it doesn't sound like it - yet. Ok, to fix it - you're going to need access to the trouble codes for the EATC system - perhaps a good service manual. It's probably a sensor failure. I am uncertain if it is a Federal Law or just good practice but most electrically/electronically operated automotive HVAC systems default to heat/defrost. So you won't freeze and you can see if all else fails. I know that the dealer is an unpopular choice but...rather that than throw parts at it until you get lucky - or not. A reputable luxury car mechanic is another choice if you aren't inclined to tackle the job your self.

5 people found this helpful.
79,195

Yes it is under the National Highway Traffic Safety Act of 1966 that beginning with 1968 models (and newer, to present) that climate control systems, either manual or automatic control, default to defrost when a failure occurs to maintain visibility under adverse driving conditions. -Jim

2 people found this helpful.

Your Answer:

Town Car

Looking for a Used Town Car in your area?

CarGurus has 1,469 nationwide Town Car listings starting at $1,900.

ZIP:

Lincoln Town Car Experts

  • #1
    Tom Demyan
    Reputation
    1,900
  • #2
    Tracy Hooks
    Reputation
    1,860
  • #3
    tennisshoes
    Reputation
    1,370
View All

Related Models For Sale

Used Mercury Grand Marquis
22 Great Deals out of 1,233 listings starting at $1,799
Used Lincoln Continental
32 Great Deals out of 3,121 listings starting at $23,995
Used Ford Crown Victoria
3 Great Deals out of 739 listings starting at $2,350
Used Cadillac DeVille
1,263 listings starting at $2,000
Used Ford F-150
2,356 Great Deals out of 208,288 listings starting at $998
Used Mercedes-Benz S-Class
142 Great Deals out of 7,007 listings starting at $3,495
Used Chevrolet Impala
384 Great Deals out of 25,757 listings starting at $950
Used Ford Mustang
260 Great Deals out of 37,873 listings starting at $1,350

Used Cars For Sale

2007 Lincoln Town Car Signature For Sale
43 listings starting at $4,500

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.