Replaced the heater core in GTA, still no heat
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From: Readsboro, VT
Car: 85 IROC-Z / 88 GTA
Engine: 403 LSx (Pending) / 355 Tuned Port
Transmission: T56 Magnum (Pending) / T5
Axle/Gears: 3.42 / ?
Replaced the heater core in GTA, still no heat
I replaced the heater core in my GTA yesterday. My defroster blows luke-warm at best, and this is with 60 degree outside air. When I put the heater core back in, the flapper door was open, but when I move the temp selector on my pushbutton heater controls, I don't hear anything move. On my IROC and my Sport Coupe, this stuff is all cable controlled, but on the GTA it seems to be nothing but a bundle of wires coming from behind the heater controls, which means there's a solenoid burried in the heaterbox somewhere, right? This is my first experience with the pushbutton controls and I guess I'm more or less looking for pointers on what to diagnose and troubleshoot. I really don't want to pull the dash apart again unless it's absolutely necessary.
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The IROC Homepage
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View the restoration of an 85 IROC</A>
Custom Thirdgen Subwoofer Enclosures
"I didn't know a bored out Ford could go so slow" -Shenandoah
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The IROC Homepage
<A HREF="http://www.rit.edu/~jli4307/camaro" TARGET=_blank>
View the restoration of an 85 IROC</A>
Custom Thirdgen Subwoofer Enclosures
"I didn't know a bored out Ford could go so slow" -Shenandoah
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Joined: Nov 1999
Posts: 1,507
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From: Elizabeth, Colorado
Car: '94 Corvette
Engine: LT1
Transmission: 4L60E
I had a problem like that with my Vette.
Turned out to be the temp door motor.
I found this out by looking down into the air box at the temp door, and seeing if it moved any after changing from max to min / min to max. (mine didn't at the time)
Then I checked to make sure that the motor was getting a signal (voltage) while changing temps (mine did), and from there it was obvious.
The temp door motor on my Vette was geared into the temp door from the bottom, inside the car. I dought it's the same, but who knows.
Ron
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'82 Trans Am
'81 Camaro Z-28
'94 Vette LT1 Coupe
[This message has been edited by ronterry (edited October 22, 2001).]
Turned out to be the temp door motor.
I found this out by looking down into the air box at the temp door, and seeing if it moved any after changing from max to min / min to max. (mine didn't at the time)
Then I checked to make sure that the motor was getting a signal (voltage) while changing temps (mine did), and from there it was obvious.
The temp door motor on my Vette was geared into the temp door from the bottom, inside the car. I dought it's the same, but who knows.
Ron
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'82 Trans Am
'81 Camaro Z-28
'94 Vette LT1 Coupe
[This message has been edited by ronterry (edited October 22, 2001).]
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Joined: Jul 2001
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From: Pueblo Co
Car: 1989 C4
Engine: L98
Transmission: 700r4
Axle/Gears: 307
You probably have a vac line disconected. There are a few vac lines behind the heater controll and a few in the engine compartment. If these arent hooked up the heater door will not open.
SSC
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85 Camaro, 355/400 "drag car" in moth ***** 13.1@ 101mph on its last season run.
Plans: Possibly add N20 for next season.
82 Firbird, getting a beef injection 355/700r4 3:42 powertrax system.
SSC
------------------
85 Camaro, 355/400 "drag car" in moth ***** 13.1@ 101mph on its last season run.
Plans: Possibly add N20 for next season.
82 Firbird, getting a beef injection 355/700r4 3:42 powertrax system.
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