A little whine from the Aircon

sylvester · 13th April 2012, 15:51

I have noticed the last couple of times I have turned it on that there is a little whine when the aircon is switched on. It sounds like a dry bearing. The system has not been recharged for about three years or so. Is that likely to sort it as I understand a recharge includes a certain amount of lubricant for the compressor or is there something else I should be looking at. The whining is only apparent when the aircon is selected. It seems to work OK though my wife doesn't think its quite as cold as it has been in the past!
Eddie B

MangoMan · 13th April 2012, 16:04

I found most Aircon units whine slightly, plus don't forget that the fan will start aswell....

And cold enough! Don't know where you are but if you want cold, I just open the window!!!!

sylvester · 13th April 2012, 16:15

Thanks for the prompt response - if the aircon had whined from new I wouldn't bother about it but it is a recent development so warrants investigation!

RoryRover · 13th April 2012, 18:45

Hi

I have the same problem with mine. When I brought the car the Air con did not work. The dealer fixed it under warranty (inc a new compressor and matrix) and it now works perfectly - but the whine really detracts from the otherwise very quiet car. Clicking econ (which disconnects the air con compressor) means the whine disapears instantly.

I have done all the other checks I have seen reccommended on the forum (fan is fine - with one of Jules gold resistors) but the whine persists.

I would love to find a fix for this so if anyone has fixed a whining air-con system at least two of us would love to know how !

T-Cut · 13th April 2012, 19:04

Aircon whines and whoops are due to excessive temperature differences within the refrigeration system. The noise doesn't come from under the bonnet or compressor or fan area but from the evaporator unit in the front of the cab. It's typically a sign that refrigeration is getting overloaded due to lack of gas or lack of condensing capacity. The first will be fixed by a recharge. If that doesn't cure the howl, then look to the condition of the slow speed fan and/or the condenser matrix.

TC

sylvester · 13th April 2012, 20:03

Thanks for that T-cut, I'll get it recharged next week and report back!

13th April 2012, 15:51	#1
sylvester Loves to post Rover 75 Tourer Join Date: Nov 2006 Location: Rochester Kent Posts: 256 Thanks: 18 Thanked 22 Times in 9 Posts	A little whine from the Aircon I have noticed the last couple of times I have turned it on that there is a little whine when the aircon is switched on. It sounds like a dry bearing. The system has not been recharged for about three years or so. Is that likely to sort it as I understand a recharge includes a certain amount of lubricant for the compressor or is there something else I should be looking at. The whining is only apparent when the aircon is selected. It seems to work OK though my wife doesn't think its quite as cold as it has been in the past! Eddie B

13th April 2012, 16:04	#2
MangoMan This is my second home Looking.... Join Date: Oct 2010 Location: England Posts: 10,911 Thanks: 862 Thanked 1,111 Times in 868 Posts	I found most Aircon units whine slightly, plus don't forget that the fan will start aswell.... And cold enough! Don't know where you are but if you want cold, I just open the window!!!! __________________ *Regards, Bill - (MangoMan).* (Member 00854) http://i1110.photobucket.com/albums/...d.jpg~original

13th April 2012, 18:45	#4
RoryRover Avid contributor Rover 75 Con SE CDTi tourer Join Date: Apr 2011 Location: Derbyshire Posts: 135 Thanks: 6 Thanked 0 Times in 0 Posts	Hi I have the same problem with mine. When I brought the car the Air con did not work. The dealer fixed it under warranty (inc a new compressor and matrix) and it now works perfectly - but the whine really detracts from the otherwise very quiet car. Clicking econ (which disconnects the air con compressor) means the whine disapears instantly. I have done all the other checks I have seen reccommended on the forum (fan is fine - with one of Jules gold resistors) but the whine persists. I would love to find a fix for this so if anyone has fixed a whining air-con system at least two of us would love to know how ! __________________ John Mk 2 2004 Rover 75 Connie SE Diesel Tourer I think I'm having a midlife crisis - good innit ?

13th April 2012, 16:15	#3
sylvester Loves to post Rover 75 Tourer Join Date: Nov 2006 Location: Rochester Kent Posts: 256 Thanks: 18 Thanked 22 Times in 9 Posts	Thanks for the prompt response - if the aircon had whined from new I wouldn't bother about it but it is a recent development so warrants investigation!

13th April 2012, 19:04	#5
T-Cut This is my second home Rover75 and Mreg Corsa. Join Date: Nov 2006 Location: Sumweer onat mote o'dust (Sagin) Posts: 21,753 Thanks: 341 Thanked 3,660 Times in 2,924 Posts	Aircon whines and whoops are due to excessive temperature differences within the refrigeration system. The noise doesn't come from under the bonnet or compressor or fan area but from the evaporator unit in the front of the cab. It's typically a sign that refrigeration is getting overloaded due to lack of gas or lack of condensing capacity. The first will be fixed by a recharge. If that doesn't cure the howl, then look to the condition of the slow speed fan and/or the condenser matrix. TC

13th April 2012, 20:03	#6
sylvester Loves to post Rover 75 Tourer Join Date: Nov 2006 Location: Rochester Kent Posts: 256 Thanks: 18 Thanked 22 Times in 9 Posts	Thanks for that T-cut, I'll get it recharged next week and report back!