Hello. I have a Buick LeSabre Custom 1987 3.8 (front-wheel drive) with automatic transmission, how…
When I press the air conditioning button on the console display panel; it blinks 3 times, but won’t engage the ac. The owner’s manual says it is the sensor. Where is it located.
There are four air temperature sensors. Two are on the right and two are on the left. There is an upper and lower.
Temperature Sensor Upper Right Side Location
Temperature Sensor Upper Left Side Location
Temperature Sensor Lower Left Side Location
Temperature Sensor Lower Right Side Location
Other information pertaining to the same issue
The red light blinks three times if you press the air conditioner button when it is below 40. The AC will not work below 40F unless its in the defrost mode, this has been designed into the system for many years to prevent accidental running of the AC in the winter when not needed.
Ive read that the exterior temp sensor- will not take an immediate reading..
and by design may take some miles of driving before it takes a reading- and then displays the updated info on your dash.
Since you have the digital AC system.. the sensors may be reading the PREVIOUS low temp which was 40 or less…
Thus your re-circulation will flash the light…
2 min later- once you’ve driven- a new temp reading has been taken- and now above 40– and now it will work and no more flashing 3 times…
Thats what I think may be happening…. just an idea.