Ambient air temperature sensor question..
Thread Starter
Melting Slicks
Joined: Aug 2003
Posts: 2,009
Likes: 0
From: gainesville fl
Ambient air temperature sensor question..
Does anyone know if the ambient air temp. sensor has anything to do with the hvac system? My ambient air temp sensor is reading 45 degrees when the actual temperature is 82 degrees. Would this cause the system to try and warm the interior of the car or is the system dependant on the return air sensor near the ignition? The compressor and refrigerent levels/pressures are all fine, but it's still blowing warm. It's as if the system is trying to compensate to the low ambient reading and is adding warm air. This system is crazy...
Last edited by Maniac; Apr 21, 2005 at 01:47 PM.
Racer
Joined: Feb 2005
Posts: 267
Likes: 0
From: Banner Elk NC
St. Jude Donor '05
Bad News the ambient air tempeture sensor is probably bad 
. Good news the part is only about $16.00. 
It is located on the bottom right inside radiator shroud. It can be acessed without jacking the car up. If it is bad your HVAC system will not turn on because it uses the outside temp. to regulate the inside temp. This happen to me where it constantly read in the low 30's and the compressor would not turn on. make sure you clean the electrical connector with contact cleaner, these sensors go bad because they are exposed to the elements. Once you change it out you need to go for a drive for it to register in the computer. It needs air flow to do this. Good Luck 
GM Temp Sensor Part # 10248414 Cost $16.60 at my local Chevy Dealer.
. Good news the part is only about $16.00. It is located on the bottom right inside radiator shroud. It can be acessed without jacking the car up. If it is bad your HVAC system will not turn on because it uses the outside temp. to regulate the inside temp. This happen to me where it constantly read in the low 30's and the compressor would not turn on. make sure you clean the electrical connector with contact cleaner, these sensors go bad because they are exposed to the elements. Once you change it out you need to go for a drive for it to register in the computer. It needs air flow to do this. Good Luck GM Temp Sensor Part # 10248414 Cost $16.60 at my local Chevy Dealer.
Thread Starter
Melting Slicks
Joined: Aug 2003
Posts: 2,009
Likes: 0
From: gainesville fl
Originally Posted by flash134
Bad News the ambient air tempeture sensor is probably bad . Good news the part is only about $16.00. It is located on the bottom right inside radiator shroud. It can be acessed without jacking the car up. If it is bad your HVAC system will not turn on because it uses the outside temp. to regulate the inside temp. This happen to me where it constantly read in the low 30's and the compressor would not turn on. make sure you clean the electrical connector with contact cleaner, these sensors go bad because they are exposed to the elements. Once you change it out you need to go for a drive for it to register in the computer. It needs air flow to do this. Good Luck
GM Temp Sensor Part # 10248414 Cost $16.60 at my local Chevy Dealer.
. Good news the part is only about $16.00. It is located on the bottom right inside radiator shroud. It can be acessed without jacking the car up. If it is bad your HVAC system will not turn on because it uses the outside temp. to regulate the inside temp. This happen to me where it constantly read in the low 30's and the compressor would not turn on. make sure you clean the electrical connector with contact cleaner, these sensors go bad because they are exposed to the elements. Once you change it out you need to go for a drive for it to register in the computer. It needs air flow to do this. Good Luck GM Temp Sensor Part # 10248414 Cost $16.60 at my local Chevy Dealer.
Racer
Joined: Feb 2005
Posts: 267
Likes: 0
From: Banner Elk NC
St. Jude Donor '05
Originally Posted by Maniac
Good news!! I pulled the sensor and found corosion. Cleaned the contacts and installed new sensor and I am COOL again!! Grand total: $8.94. Nothing ever goes this well for me. I better enjoy it!!
