humming noise from AC of RX 300?

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Old 20 Mar 2010, 11:18 am   #1 (permalink)
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Default humming noise from AC of RX 300?

Lately, there has been a really loud humming noise coming from the AC unit of my RX 300. It goes away after a few minutes or if I turn on the defrost. Also if the AC is on when I start the car there is a squicking belt sound that goes away as soon as I turn off the AC.Does anyone have an idea what this might be from?
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Old 20 Mar 2010, 11:35 am   #2 (permalink)
Rob
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this could be that you car needs a new A/C compressor when you start your car up your compressor does not want to turn which is forcing the belt to slip around the the A/C compressors pulley wheel. If it is your compressor than your looking at $600 or more to have it replaced or if you could just have it bypassed for now but than you wouldn't have A/C or defroster.
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Old 20 Mar 2010, 11:40 am   #3 (permalink)
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it may be your ac pullys the bearings somtimes squeak
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Old 20 Mar 2010, 11:55 am   #4 (permalink)
R C
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Actually sounds like you have two issues.































1st - Humming sound could be from the blower motor. Remove and check for dirt and leaves in the housing or fan blades.































2nd - Inspect your fan belt, it could be glazed and need replacing. Does the system blow cold? If not the worst case scenario is the A/C compressor is locked frozen or the clutch is worn out.
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Old 20 Mar 2010, 12:00 pm   #5 (permalink)
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Take your overpriced Rav4 to the dealer, you can afford it since you pay way too much for that thing.
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