Quote:
Originally Posted by jakeyf08
I have yet to find the source of the leak. I notice that when I start the vehicle you can hear the noise, then when u turn the max ac or ac on the noise continues but when i turn the control to the floor and top vent setting the noise stops. I hope this can help diagnose the problem.
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You are going to have to look and listen for the leak.
Check the vacuum lines to ac/heater housing and the vacuum pots on it.
Pot is leaking or hose off or bad.
What year make and model and engine is it?