Quote:
Originally Posted by StraightOuttaCanadaEh
Noticed yesterday how annoying the din coming from the passenger footwell is when I have the A/C on. Doesn't matter where I direct the airflow to, that's where the sound comes from. Is the A/C pump or whatever located behind the dash there? If you ever had a very old TV that would produce this annoying constant tzzzzzzz sound, then you know what this sounds like. It's like white noise. I have to play music, otherwise it's drilling into my brain. Wonder why I never noticed it before. Anyone else have this?
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If it's strictly the A/C then you hear the refrigerant spraying into the evaporator. You should hear it start spraying when the compressor kicks in and then for a few seconds after it cuts out.
The compressor cycles to keep the evaporator from freezing.