Outside temp reads 29 when its 95
Thread Starter
Heel & Toe
Joined: Jul 2011
Posts: 23
Likes: 1
From: Hoschton, Ga
Outside temp reads 29 when its 95
Read several previous threads about outside temp sensor, all good.
Found sensor, unplugged sensor, found corroded pin, cleaned pin. Checked temp unplugged, 69 degrees.
Replugged old sensor, now temp reads 29. Unplugged old sensor, temp still reads 29.
Inspected wires with strong glasses, cannot see any issues.
Measured resistance across socket, 920k ohms, not infinite.
Gotta drive car, but with no ac, ouch! Help please,
Charlie
Found sensor, unplugged sensor, found corroded pin, cleaned pin. Checked temp unplugged, 69 degrees.
Replugged old sensor, now temp reads 29. Unplugged old sensor, temp still reads 29.
Inspected wires with strong glasses, cannot see any issues.
Measured resistance across socket, 920k ohms, not infinite.
Gotta drive car, but with no ac, ouch! Help please,
Charlie
Melting Slicks
Joined: Jan 2008
Posts: 2,590
Likes: 48
From: Nathalie VA
St. Jude Donor '15-'16-'17-'18
Thread Starter
Heel & Toe
Joined: Jul 2011
Posts: 23
Likes: 1
From: Hoschton, Ga
Yes, took it out and drove it 3 or 4 miles, outside temp started moving up...and AC compressor came on.
Ordered a new probe...didn't want to try the old one again...even cleaned up.
Thanks too about C temp possilble change, but it was the driving that made it work. Interesting way the system "learns."
Y'll take care, Charlie
Burning Brakes
Joined: Jul 2010
Posts: 789
Likes: 4
From: Longmont on the Front Range of Colorful Colorado
I am having the same problem since I did the resoldering of the hvac contriol unit in my '99 'vert. I am reading 32 F and 0 c so the ac will not kick in, I have driven the car for miles and the ambient temp does not change. I have cleaned the sensor connections.
Any other thoughts? I will put a new sensor in, but I hate to replace pieces without knowing they are bad. (sesnor is not expensive)
Thanks for any input.
Any other thoughts? I will put a new sensor in, but I hate to replace pieces without knowing they are bad. (sesnor is not expensive)
Thanks for any input.
Thread Starter
Heel & Toe
Joined: Jul 2011
Posts: 23
Likes: 1
From: Hoschton, Ga
Hi Rick,
Check the wires at the connectors. I had to put light there and use some + 2.0 glass to inspect clearly. Those gray wires with the black strip are separate by the blue snap on connector--which seems to be there to strengthen the connection. I would try unplugging the probe, drive it, and see if the outside temp goes to 69. The probe connects directly to the climate control module. In another thread on this, there is the electrical diagram. Also connector is copper, it could be corroded by water getting past the seal. I cleaned it all up, and even though my car has been in the rain twice, I guess ater gets in there even during washing. Keep us posted on how it goes. Cheers, Charlie--old electronics tech.
Check the wires at the connectors. I had to put light there and use some + 2.0 glass to inspect clearly. Those gray wires with the black strip are separate by the blue snap on connector--which seems to be there to strengthen the connection. I would try unplugging the probe, drive it, and see if the outside temp goes to 69. The probe connects directly to the climate control module. In another thread on this, there is the electrical diagram. Also connector is copper, it could be corroded by water getting past the seal. I cleaned it all up, and even though my car has been in the rain twice, I guess ater gets in there even during washing. Keep us posted on how it goes. Cheers, Charlie--old electronics tech.
Thread Starter
Heel & Toe
Joined: Jul 2011
Posts: 23
Likes: 1
From: Hoschton, Ga
PS Check the resistance with the sensor unplugged. My car is the same year as yours...mine resistance between the pins was 920 K ohms. If you don't have a digitial volt ohm meter, Radio Shack has 'em for about $20...good investment for "digital cars" :-)
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Burning Brakes
Joined: Jul 2010
Posts: 789
Likes: 4
From: Longmont on the Front Range of Colorful Colorado
Charlie,
Thanks for the suggestions. I am on vacation and away from the car for a couple of days. I will give you suggestions a try. I fear I may have done some damage when I was touching up the solder joints in the control unit.
I'll let you know how it goes, thanks again for the input.
Thanks for the suggestions. I am on vacation and away from the car for a couple of days. I will give you suggestions a try. I fear I may have done some damage when I was touching up the solder joints in the control unit.
I'll let you know how it goes, thanks again for the input.