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flyfisher117

4Runner Ac Making A Humming Noise?

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This just started happening the other day. I have a '97 4runner and when the AC is turned up to any of the settings other than low it makes an annoying humming noise. Its not a quiet humming either, its loud and almost sounds like the fan is missing all but one blade (its not because it still blows nice cold air). Sound is coming from passenger side up under the dash, and can also slightly be noticed from the outside.

Ive looked up under the dash and the sound seems to be coming from a large white plastic box I can touch the box or apply slight pressure and the humming sounds will change tones a little bit, but not completely go away.

Any thoughts? Or things to try fixing?

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