Topic: A/C Heater
in Forum: C4 Cooling and Heating Systems
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lanoka harbor, NJ - USA
Joined: 3/22/2009
Posts: 1363
Vette(s): 1990 L-98 white/ red/black leather interior targa top auto
1975 L48 blue/black leather interior t tops auto
is it the electronic or manual control.
the dynamic duo
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Duncanville, TX - USA
Joined: 3/18/2009
Posts: 2246
Vette(s): 1985 Coupe-L98/Auto,Bright Red/Carmine.
1974 Coupe-L48/4speed, Medium Red Metallic/Black Deluxe.
Do the numbers on the display change when you try to adjust the temp? If they do, then you are prolly looking at a vacuum issues under the dash somewhere.
IF the numbers do NOT change, the problem is most likely in the control head itself...
Do you have access to a scanner, or are you familiar with the on board diagnostics? YOu can prolly pull some codes out of the BCM(Body control module), and that might give you a place to start.
IF the numbers do NOT change, the problem is most likely in the control head itself...
Do you have access to a scanner, or are you familiar with the on board diagnostics? YOu can prolly pull some codes out of the BCM(Body control module), and that might give you a place to start.
Joel Adams 
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(click for Texas-sized view!) NCRS
"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
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Duncanville, TX - USA
Joined: 3/18/2009
Posts: 2246
Vette(s): 1985 Coupe-L98/Auto,Bright Red/Carmine.
1974 Coupe-L48/4speed, Medium Red Metallic/Black Deluxe.
To get the codes, press and hold the fan "up" and "down" buttons at the same time for aboot 5 seconds or so. The display will show -00. When that is displayed, press(but don't hold) the Auto button. Any codes in the HVAC system will display.
00 = No faults
01 & 02 = Temp door actuator circuit fault
03 = Outside temp sensor circuit open
04 = II II II II short
05 = In-car temp sensor circuit open
06 = II II II II II short
07 = Sunload sensor open
09 = Low refrigerant detected
10 or "---" = Serial data failure
hth
00 = No faults
01 & 02 = Temp door actuator circuit fault
03 = Outside temp sensor circuit open
04 = II II II II short
05 = In-car temp sensor circuit open
06 = II II II II II short
07 = Sunload sensor open
09 = Low refrigerant detected
10 or "---" = Serial data failure
hth
Joel Adams
My Link
(click for Texas-sized view!) NCRS
"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
in Forum: C4 Cooling and Heating Systems
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