Electronic Climate Control Thermometer - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


General GM Chat When starting new posts, please specify YEAR, MAKE, MODEL, ENGINE type, and whatever modifications you have made. Chat about all things GM (and related cars). Off-topic stuff should be in the Lounge, and all Model specific mechanical problems should be posted in the proper forum.

Reply
 
 
 
Thread Tools Search this Thread
Old 05-24-2004, 01:02 AM   #1
Senior Member
Posts like a Northstar
Thread Starter
 
Join Date: Sep 2002
Location: Riverton, Wyoming
Posts: 740
Thanks: 0
Thanked 0 Times in 0 Posts
egladman is on a distinguished road
Default Electronic Climate Control Thermometer

How accurate is everyone'* thermometer in there car. The one in my 93 seems to be off anywhere from 5 to 10 degrees at any given time. The one in my 89 seems to be accurate within 5 degrees. Also would this have any effect on how my climate control works? I set the temp at 75 and it seems like it cools it way past 75 so I moved it up to 80 and now it seems just comfortable. Does the thermometer need replaced or something else?
egladman is offline   Reply With Quote
Old 05-24-2004, 01:05 AM   #2
Senior Member
True Car Nut
 
Join Date: Feb 2003
Location: Bloomington-Normal, IL 1997 SE
Posts: 3,734
Thanks: 0
Thanked 0 Times in 0 Posts
macho_mike21 is on a distinguished road
Default

when you set the temp it sets the temp of the air coming out of the vents, you have to adjust it to get it to where it feels comfortable to you. If you are talking about the outside temp, you might need to replace the thermometer, its in front of the rad/condenser, you will see it if you pop the hood and look straight down.
macho_mike21 is offline   Reply With Quote
Old 05-24-2004, 01:08 AM   #3
Senior Member
Posts like a Northstar
Thread Starter
 
Join Date: Sep 2002
Location: Riverton, Wyoming
Posts: 740
Thanks: 0
Thanked 0 Times in 0 Posts
egladman is on a distinguished road
Default

Quote:
Originally Posted by macho_mike21
when you set the temp it sets the temp of the air coming out of the vents, you have to adjust it to get it to where it feels comfortable to you. If you are talking about the outside temp, you might need to replace the thermometer, its in front of the rad/condenser, you will see it if you pop the hood and look straight down.
yeah i'm talking about the outside tempearture being off.
egladman is offline   Reply With Quote
Old 05-24-2004, 09:48 AM   #4
Senior Member
Posts like a Turbo
 
Join Date: Sep 2003
Location: Halifax Nova Scotia ASE Master Service Tech
Posts: 376
Thanks: 0
Thanked 0 Times in 0 Posts
A Bonnie Canuck is on a distinguished road
Default

The climate control uses both of these temperature sensors (inside and outside) plus the solar sensor on the dash to determine appropriate settings. If the outside sensor is not reading properly then the inside temp will not be set properly. 10 degrees F seems like a bit much to be off. Mine is within 1 degree C all the time.
A Bonnie Canuck is offline   Reply With Quote
Old 05-24-2004, 11:44 AM   #5
Junior Member
 
Join Date: Aug 2002
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
Custom88 is on a distinguished road
Default

the temperature reading also is not accurate if you're sitting in traffic on a hot day, or if you havent' been driving the car because of the heat from the road, and the heat from the radiator affects the reading. it'* only accurate when you've been moving for a while so that it gets heated to the same temperature as the air that'* passing over it.
Custom88 is offline   Reply With Quote
Old 05-24-2004, 02:05 PM   #6
Senior Member
True Car Nut
 
Join Date: Jul 2003
Location: Toronto, Ontario, Canada
Posts: 5,158
Thanks: 0
Thanked 0 Times in 0 Posts
repinS is on a distinguished road
Default

After washing the car on a warm day, mine read minus some degrees Celcius
repinS is offline   Reply With Quote
Old 05-24-2004, 05:59 PM   #7
Senior Member
True Car Nut
 
Join Date: Sep 2002
Location: Chicago, IL
Posts: 2,409
Thanks: 0
Thanked 1 Time in 1 Post
acg_ssei is on a distinguished road
Default Re: Electronic Climate Control Thermometer

Quote:
Originally Posted by egladman
I set the temp at 75 and it seems like it cools it way past 75 so I moved it up to 80 and now it seems just comfortable. Does the thermometer need replaced or something else?
The outside sensor is mounted at the bottom center of the radiator support, easily visible if you look under the nose of the car. Unless it'* obviously damaged by something, I'd leave it alone.

The inside sensor is mounted behind the little grille in the upper trim plate, to the right of your gauge cluster next to the lighter. I think your problem is most likely that this sensor is covered by dust and is slow to respond. The climate control uses this sensor to measure the inside temperature so it can get some feedback and determine how much cold or warm air it needs to put out, and what its fan speed needs to be.

A low vacuum source is used to draw air into that grille and over the temperature sensor, so over time, it becomes covered in layers of dust. Try using a shop vac to snort out that little grille and improve the airflow over the sensor. (Ideally, you could unscrew the upper trim panel and remove it, so you can brush off the sensor with a soft paintbrush or something like that.)
acg_ssei is offline   Reply With Quote
Old 05-25-2004, 02:13 PM   #8
Senior Member
Posts like a Camaro
 
Join Date: Dec 2003
Location: Massachusetts
Posts: 1,019
Thanks: 0
Thanked 0 Times in 0 Posts
CFoote is on a distinguished road
Default

If your outside temp reading is off, I would just replace the sensor. I know those sensors are known to go bad after 5-6 years on Chryslers and BMWs.
CFoote is offline   Reply With Quote
Old 05-25-2004, 05:23 PM   #9
Senior Member
True Car Nut
 
Join Date: Sep 2002
Location: Chicago, IL
Posts: 2,409
Thanks: 0
Thanked 1 Time in 1 Post
acg_ssei is on a distinguished road
Default

Quote:
Originally Posted by CFoote
If your outside temp reading is off, I would just replace the sensor.
Okay, hang on a minute here. As I understand it, the main problem is that the car is cooling down way past the dialed-in setting of 75:

Quote:
Originally Posted by egladman
I set the temp at 75 and it seems like it cools it way past 75 so I moved it up to 80 and now it seems just comfortable. Does the thermometer need replaced or something else?
This tells me that the internal temperature sensor, behind the little grille next to the lighter, is slow to respond (i.e. to chill down in response to the cool air inside the car). In my experience, that'* probably due to dust and dirt buildup on it, and removing the grille for a little cleaning may improve its responsiveness.

I think it'* also possible, through the climate-control diagnostics menu, to bring up a reading of what the inside temperature sensor is reporting.

As for the outside temperature being off, I wouldn't bet on that unless the display is showing you totally ludicrous readings. The location of the outside sensor gives pretty steady readings, but it might get a little thrown off by things like hot pavement, etc.
acg_ssei is offline   Reply With Quote
Old 05-25-2004, 11:54 PM   #10
Senior Member
Posts like a Camaro
 
Join Date: Dec 2003
Location: Massachusetts
Posts: 1,019
Thanks: 0
Thanked 0 Times in 0 Posts
CFoote is on a distinguished road
Default

Quote:
Originally Posted by acg_ssei
Okay, hang on a minute here. As I understand it, the main problem is that the car is cooling down way past the dialed-in setting of 75:
That'* not the way I read it. His original question was that his external temperature reading was 5-10 degrees off. If the exterior sensor is way off, then it will throw the entire system off.
CFoote is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Electronic Climate Control display problem -- No, this one's bigred 1992-1999 9 10-01-2003 02:58 PM
Electronic Climate Control Not Working egladman 1987-1991 1 07-17-2003 02:29 PM
Climate Control Thermometer macho_mike21 2000-2005 9 06-12-2003 11:33 PM
Can I put an electronic climate control in a car with manual parallelcircuits 1992-1999 4 05-02-2003 06:24 PM
electronic climate control trouble codes Fordolet General GM Chat 8 11-21-2002 01:19 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 04:01 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.