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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Mechanical Maintenance: Break-in / Oil & Fluids / Servicing / Warranty > Air Conditioning Rumbling Noise



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      03-30-2019, 07:29 AM   #1
BimmerLad
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Air Conditioning Rumbling Noise

Hi all, just wanted to report that I've been suffering with a rumbling whiny like helicopter notice whenever the A/C is engaged.

After looking around I thought it might be low Freon...

I've just got back from the Mechanics and after pulling a vacuum on the system for 20 minutes and then refilling with gas and 14g oil the noise is gone

If anyone else has a helicopter stuck in their AC then have someone vacuum the system and refill with gas and oil
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