Whistle Noise HVAC

Willsbma · 12-13-2016, 11:57 AM

Recently noticed a loud whistling noise when cruising around 65-70 with the auto climate control on. If I turn on the recirculated air it goes away. I'm guessing there's a flap leaking somewhere. Anyone fix a similar issue?

Efthreeoh · 12-14-2016, 12:05 PM

Try it in manual mode and adjust the fan speed to see if the noise comes or goes away. It could be the blower motor.

Willsbma · 12-16-2016, 07:00 PM

Quote:

Originally Posted by Efthreeoh

Try it in manual mode and adjust the fan speed to see if the noise comes or goes away. It could be the blower motor.

Doesn't change with fan speed. Only notice it around 65-70 and it goes away completely when I turn the recirculate on

12-13-2016, 11:57 AM	#1
Willsbma First Lieutenant 77 Rep 330 Posts Drives: 07 328xi Join Date: Nov 2015 Location: 11703 iTrader: (0)	Whistle Noise HVAC Recently noticed a loud whistling noise when cruising around 65-70 with the auto climate control on. If I turn on the recirculated air it goes away. I'm guessing there's a flap leaking somewhere. Anyone fix a similar issue?
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12-14-2016, 12:05 PM	#2
Efthreeoh General 17336 Rep 18,750 Posts Drives: The E90 + Z4 Coupe & Z3 R'ster Join Date: May 2012 Location: Virginia iTrader: (0)	Try it in manual mode and adjust the fan speed to see if the noise comes or goes away. It could be the blower motor. __________________ A manual transmission can be set to "comfort", "sport", and "track" modes simply by the technique and speed at which you shift it; it doesn't need "modes", modes are for manumatics that try to behave like a real 3-pedal manual transmission. If you can money-shift it, it's a manual transmission. "Yeah, but NO ONE puts an automatic trans shift knob on a manual transmission."
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