Whining from engine bay when Air Con On

[DrewBear11]

Hey guys..

last couple of days I've noticed that i can hear a whining coming from the engine bay and can hear the sound through the blower vents when I've got the air conditioning running... Air con pump ??

For example, it was raining when I got in the car after work and the car steamed up so I turned on the air con and could hear the whining, when I turned off the air con off (normal blowers running) the noise stopped.

The air con seems to work as the car de steamed pretty fast so I don't think it needs re-gassing.. haven't tested the coldness but seeing as it de steamed the car fast I cant see that being a problem...

I did search but I couldn't find any answers..

Any advice much appreciated

 

[DrewBear11]

Anyone got any ideas ? Cheers

 

[MicKPM]

It's unlikely to be pressure related as the system self monitors this and if it's so low as to cause the pump to function incorrectly it simply won't allow its operation. I'd say you're on the money with the pump as the most likely cause of the whine if its only there when the magnetic clutch is engaged.

 

[Jonny1*2]

Bearing maybe. It's not needing regassing, if it does, you'll heard a hissing noise when you put it on (plus lovely warm uk air )

 

[DrewBear11]

Ah right, lovely job cheers for the replies fellas.

Just gonna see how it goes for now i think.... not overly worried tbh

 

[MicKPM]

Obviously its not a complete doom and gloom situation but I wouldn't be quite so trusting as the noise is there because something isn't 100% right. If that A/C Compressor goes due to some unforseen 'issue' chances are the aux belt goes with it... which can (and does) slip the crank sprocket buggering up the timing.