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#1
05-24-2005, 04:56 PM
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Hissing sound from heater/AC
Hi, last week I went to turn my heat off on my 86 Cutlass Ciera and it seemed 'stuck'... then a small brown plastic cylinder cracked and fell on the floor through the middle of the dash.
Ever since this happened I get a hissing sound every time I turn the engine on, and the fan is blowing AC through the top vent when I'm driving down the road. I can still control the AC with the switch, the fan works fine and is adjustable, the heat will come on if I move it over, etc... but this hissing is getting annoying. ??? Thank you. 
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#2
05-25-2005, 06:49 AM
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Re: Hissing sound from heater/AC
The heater/ac is controlled by vacuum. The hissing sound is a vacuum leak. I can't tell from your description what fell off but if you replace it or find the hose it was connected to and block it off with a golf tee the hissing should go away.
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