RX350 07' - knocking noise when a/c turned on

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Jul 18, 2017 | 05:05 AM

shlomie11

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Joined: Dec 2016

Posts: 32

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From: Israel

RX350 07' - knocking noise when a/c turned on

The car:Lexus RX350 07', 190,000 KM, automatoc transmission
The problrm:Knocking noise when a/c turned on
I dont know what is the soutce of the noise, initialy i thought it came from the engine but drom closer inspection, it seems like it came from the belt tensioner or one of the pulleys. the sound starts only when the A/C turned on and stop when A/C turned off. i tried to see if ther is any plastic/metal movement but apperantly there isnt.
So, how can i find the problem? has anyone ever saw it before?

Jul 18, 2017 | 07:04 AM

05RX330AWD

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Joined: Jan 2017

Posts: 556

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From: Quebec

If your compressor is making noise, there are 2 possibilities. Either the compressor is failing internally, or there may be insufficient refrigerant in the system to circulate the oil.

Jul 18, 2017 | 08:06 AM

mdbrown

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Joined: Aug 2011

Posts: 717

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From: Virginia

Quote:

Originally Posted by 05RX330AWD

If your compressor is making noise, there are 2 possibilities. Either the compressor is failing internally, or there may be insufficient refrigerant in the system to circulate the oil.

Or the compressor clutch is on it's way out.