Weird squeak from middle AC vents. 2 Videos, need some help
Thread Starter
Super Member
Joined: Apr 2007
Posts: 601
Likes: 6
From: Kansas
2001 CLK430, 2012 CLS550
Weird squeak from middle AC vents. 2 Videos, need some help
So lately my AC has had some issues with blowing cold. Ive ran diagnostics and nothing sticks out to me. I get somewhat cold air for a few minutes after start than it just blows hot.
As of yesterday I have noticed a short squeek/squeal which happens 4-5 times after turning on ac. It seems like this noise coincides with the compressor kicking on and off but im not positive.
My first thought was the expansion valve. Almost sounds as if something needs some oil or lube.
This is a new one to me but if anybody has any insight I'd really appreciate your thoughts.
Thanks
As of yesterday I have noticed a short squeek/squeal which happens 4-5 times after turning on ac. It seems like this noise coincides with the compressor kicking on and off but im not positive.
My first thought was the expansion valve. Almost sounds as if something needs some oil or lube.
This is a new one to me but if anybody has any insight I'd really appreciate your thoughts.
Thanks
Thread Starter
Super Member
Joined: Apr 2007
Posts: 601
Likes: 6
From: Kansas
2001 CLK430, 2012 CLS550
I just got home and opened the hood up to observe. Upon start and turning ac on, I noticed the compressor was kicking on for a couple seconds than off for a few...it did this 3 or 4 times which is when I turned the car off.
I'm guessing that the squeal noise does coincide with the above mentioned compressor cycling...
Any thoughts guys? Would a failed expansion valve cause the compressor to kick off and on?
I'm guessing that the squeal noise does coincide with the above mentioned compressor cycling...
Any thoughts guys? Would a failed expansion valve cause the compressor to kick off and on?
Thread Starter
Super Member
Joined: Apr 2007
Posts: 601
Likes: 6
From: Kansas
2001 CLK430, 2012 CLS550
MarcusF, any insight for a fellow old time member? Both aux fans work fine, duo valve is working like it should ect.
Stealership wants $316 just for a freon evac and recharge! Ugh!
Stealership wants $316 just for a freon evac and recharge! Ugh!
Member
Joined: Feb 2011
Posts: 95
Likes: 4
From: Louisville, Ky
1999 CLK 320
Dose the AC actually work? Do you get cold air? I know that if your low on Freon it will cause the compressor to shut down. Do you have the readouts form the climate control system. Here is the Link to MarcusF instructions if you don't already have them. Good luck
http://www.fitzhughmedia.com/MBF/acdiag.html
http://www.fitzhughmedia.com/MBF/acdiag.html
Member
Joined: Mar 2014
Posts: 147
Likes: 2
2002 CLK430
sounds to me like you are low on cold juice. Grab a recharge kit from the parts store with a gauge and give it a drink. The compressor clicking on/off is called short cycling and a classic symptom of low r134a.
