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- - AC Off Red Light Remains (https://mercedesforum.com/forum/mercedes-s-class-11/ac-off-red-light-remains-28169/)

LGSRAY4

Mar 28, 2008 07:22 AM

AC Off Red Light Remains

I own an S430 2004. The air conditioner is notworking and the "AC OFF" light remains on. The AC can not be switched on. Help, it beginning to get hot!!!

saleen1276

Mar 30, 2008 12:32 AM

RE: AC Off Red Light Remains

there is a leak in the sysem or a faulty sensor....most likely a small leak...it has to be reset by the dealer...disconnecting the battery will not reset it...have the system checked out and dye insertied to locate leak and recharge sytem...should take approx 2.2 to
2.7 lbs r134a

Peter Guenther

Apr 6, 2008 03:09 PM

RE: AC Off Red Light Remains

The red light indicates the compressor is not running. You either have a bad pressure sensor, or a leak. Try the diagnostics
http://www.continentalimports.com/ser_ic40142.html

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