2006 C6 26,000 miles. Garage queen in winter. AC temperature in center of dial shows 37 degrees. Dials only go as low as 60 degrees so AC will not come on. I left it for the winter with a battery tender. Do I have to dis-connect the battery to lose memory or what. I do not know where the sensor is. Any help would be appreciated.
Thanks

 

How long did you drive it? Mine does the same thing, and it takes a few miles, and turning it off and back on a couple of times, before it resets.

 

maybe 5 miles. I will try what you said. thanks

 

Press both defrost buttons and the fan speed up buttons simultaneously.

Edit: You can use fan down and the other buttons as well.

 

Yup, first, second and fourth buttons from the right, simultaneously and the outside temp will reset immediately.

 

+ 1

 

Thanks to all that helped. Love this quorum.

 

A Quorum is/was for computer clusters... This on the other hand is a forum..

 

I still appreciate all of the responses that help me with my questions. The name of our group is a forum, but i mistakenly called it a quorum. I still like my wording better in this case because Webster dictionary defines a quorum as a select group which all of you are. Almost.

 

well one of the definitions anyway...

 

2006 owner's manual, pages 3-28 and 3-29.

 

I too have a 2006, just turned 28,000 miles and just started having this problem. Sometimes on start up, outside temp display is way low and prevents A/C from functioning properly. Tried the above reset, (just once so far), and it worked. So as in times past I value this forum's value. But a related question, what caused the system to need this reset and what is the fix if the malfunction continues?

 

I'm thinking that you don't really have a malfunction. The outside temp sensor is placed just in front of the radiator on the passenger side. It is placed there because when the car is moving, the temp shown will be most accurate if the sensor is out in the fresh air flow, before the car can have any effect on the reading. But think about what happens when you arrive at a destination and turn the car off. A couple of minutes after shutoff, the sensor has no airflow and is sitting right next to the hot radiator, so it will show a very high outside temp...obviously incorrect. So GM has programmed the computer to modify the info from the sensor, rather than simply report it exactly in real time. If you stay at that destination for a few minutes, you wouldn't want the car to think that the outside temp was something like 160 degrees when you restart the car. So the computer ignores the info from the sensor until the car starts moving and the sensor temp has been brought down to a reasonably accurate level by the fresh air flow from the movement of the car. This takes a few minutes, so the computer is set to wait a few minutes before taking that reading from the sensor and acting upon it. The same process works in reverse when it is very cold outside. So the bottom line is that you can either reset it manually with the three button push, or just give the system a little time to work as intended by driving a few miles.