2005 is ac controller scream? - Lexus IS Forum
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post #1 of 4 (permalink) Old 10-03-2017, 02:38 PM Thread Starter
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2005 is ac controller scream?

Recently on my 05 is 300 the ac fan has been randomly dropping to low (I always run in auto mode) and then back to whatever speed it was at. I didn't think much of it until today, when I got in the car and heard the worst high pitch noise. At first I thought it was coming thru the radio so I checked the antenna wires. At that point I discovered it was actually either the fan it's self or the controller unit. Attached is a video of the car making the sound. I wasnted to get some input before I just start replacing components. Pretty sure the controller is dying. What do you think?
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post #2 of 4 (permalink) Old 10-03-2017, 03:02 PM
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post #3 of 4 (permalink) Old 10-03-2017, 03:35 PM
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Random speed drops can be the controller or the fan. That saying that it is still coming out the same vents. Just at low speed. Need more info.
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post #4 of 4 (permalink) Old 10-03-2017, 04:35 PM Thread Starter
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I apologize. The video won't post on mobile. Ill add it tonight when I get home. The sound is a high pitch squeal. The lower the fan speed the louder it squeals. I've traced the source of the sound to the passenger floor board area. It's also accompanied by what I can only describe as TV channel static intermittently. Possibly the most annoying sound I've ever heard.
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