Outside Temp Sensor
Thread Starter
Heel & Toe
Joined: Jan 2009
Posts: 19
Likes: 2
From: California
Outside Temp Sensor
Auto climate control readings for outside temp on my '99 recently became stuck in the mid 40 degree range regardless of outside temps. Any clues as to cause and possible repairs?
Burning Brakes
Joined: Jan 2006
Posts: 1,170
Likes: 27
From: Magnolia Greens NC
here ya go...
A faulty outside air temp sensor:
GM Part # 10248414 is aprox. $10 from the dealer and just plugs in.
The sensor is located on the right (passenger) side of the car, on the outside of the frame rail in the very front by the headlight.
It is held onto the mounting hole on the frame by a plastic push-in clip.
Just pull the clip out of the hole on the frame, release the plug for the wire (the plug has a release clip, pry up on the clip and the plug will release).
Then just put in the new one and you will be in business - it takes a few minutes of driving for the sensor to start reading the outside temp - you have to be moving.
The sensors are either resistance temperature detectors (RTD's) or Thermistors. The resistance of the sensor changes with the temperature.
If you have any corrosion in any of the associated connectors it will increase the resistance that the climate controls is reading.
The resistance across the two sensor wires could be almost infinity,
in that case your display would read a low temp.
Once the old sensor is removed, the HVAC defaults to 69* and will let the AC turn on.
GM Part # 10248414 is aprox. $10 from the dealer and just plugs in.
The sensor is located on the right (passenger) side of the car, on the outside of the frame rail in the very front by the headlight.
It is held onto the mounting hole on the frame by a plastic push-in clip.
Just pull the clip out of the hole on the frame, release the plug for the wire (the plug has a release clip, pry up on the clip and the plug will release).
Then just put in the new one and you will be in business - it takes a few minutes of driving for the sensor to start reading the outside temp - you have to be moving.
The sensors are either resistance temperature detectors (RTD's) or Thermistors. The resistance of the sensor changes with the temperature.
If you have any corrosion in any of the associated connectors it will increase the resistance that the climate controls is reading.
The resistance across the two sensor wires could be almost infinity,
in that case your display would read a low temp.
Once the old sensor is removed, the HVAC defaults to 69* and will let the AC turn on.
