high pitch sound with heat on
#1
Lead Lap
Thread Starter
high pitch sound with heat on
I went to go start my LS460... put the heat on, its fine.. when I turn the heat up on high I get this annoying high pitched sound. It has to do with the heat system because when I turn it off it goes away...
I'm scared to keep the car running...
Any idea, guess I know where I'm going tomorrow
I'm scared to keep the car running...
Any idea, guess I know where I'm going tomorrow
#4
Lead Lap
Thread Starter
#6
Thanks for the great video/sound. Today's technology is awesome. My guess is that it is a bearing in the A/C system blower. It might not be a problem after the Spring Thaw. What was the temperature where your car was when you made the recording?
#7
Lead Lap
Thread Starter
edit - The gauge says 23
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#8
I had a similar occurrence one time when a leaf found it's way into an air plenum.
It would change when the fan speed was changed.
Finally fished the leaf out and everything was normal.
It would change when the fan speed was changed.
Finally fished the leaf out and everything was normal.
#9
I also had a similar occurrence on a non-Lexus vehicle and immediately concluded my heating/cooling system was seriously ill. Then I discovered that the front passenger window was ever so slightly down and the cooling system was drawing air in through the window and making a very high pitched whistling sound. Therefore, you might want to ensure that all of your windows have been fully raised.
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