Thread: Hissing sound from heater/AC
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Old 05-25-2005, 05:49 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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