Question about AC controls.....
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Car: 1989 Pontiac GTA Hardtop.
Engine: ZZ4 - 350
Transmission: Garbage
Question about AC controls.....
Hey Guys, I was replacing the radio pod on my GTA, and I broke that little valve that has all the vacuum lines on on it that control (Max, Norm, Bi-level, Heat & defrost) for the AC. It was hissing when I shut the ac off. So I bought a brand new one from the dealer, it was $15. It is just a little round plastic piece with a rubber diaphram in it and the vacuum lines go to it. Well I put it in and it was fine for about a week. Now when I put the heat on it hisses for a while before stopping. Then once it stops it is fine. But if the car sits a while it hisses again for a bit and then is fine again. I checked it out and all the vac lines going to the part are fine and connected. Is it possible this part that I bought is defective?? I don't know what else it would be since I hear the hissing coming right from there. Any help would be appreciated. My controls are just the slide type, they are not digital.
Thanks!!
Mike
Thanks!!
Mike
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Car: 4
Engine: 6
Transmission: 5
The hissing is normal, that's the sound of vacuum moving through it to get to the little diaphragms.
You don't want a vacuum leak under your dash, that stuff is nasty. You have to use a special tool called a "vacuum cleaner" to get all the little piles of it up. And it's hazardous waste too, it has been conclusively proven that laboratory rats can only survive for a few seconds in an atmosphere of pure vacuum. At least it cures cancer though.
You don't want a vacuum leak under your dash, that stuff is nasty. You have to use a special tool called a "vacuum cleaner" to get all the little piles of it up. And it's hazardous waste too, it has been conclusively proven that laboratory rats can only survive for a few seconds in an atmosphere of pure vacuum. At least it cures cancer though.
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Car: 1989 Pontiac GTA Hardtop.
Engine: ZZ4 - 350
Transmission: Garbage
LOL RB83 about that "Special tool". I know the hissing is normal for a few seconds, but not for a few minutes. When I step on the gas the hiss quiets down. It then eventually goes away. But if I shut the car off and come back to it about an hour or two later, it is hissing again. I never had any problems until I replaced the radio pod. Then I broke the valve piece. And when I bought the new Valve it was ok for about a week. Now it is hissing, and it is definitely coming from that valve. Could it be that Diaphram in the valve piece?? That is the only piece I can see being the problem.
Later
Mike
Later
Mike
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