AC light ON means A/c off right? why cant i turn my light off? button just does nothing although red light is on ... is this right?

 

The red light means the a/c is on not off.

 

Sounds like what I had a few months ago, no matter how many times you press it the AC OFF light won't go out. It's a bad sensor in the AC system, IIRC it's the hydroactive pressure sensor but I'll check my invoice when I get home if you like. It won't be an expensive fix. For labour and part it was $280 at the dealer.

 

so to confirm .... the light on means the air con is turned ON?

 

the ec light on and not being able to shut it off means the ac is not on.
Usually low r134a and the sensor shuts down the compressor for protection.
If you have digital climate control see if you can run the onboard diagnostic program for the ac if your model allows it.
Otherwise any good ac shop can check for leaks and refill the system.

 

No, it's an 'AC OFF' light, so if the light is on the AC is not working.

 

thank you for reply!
will contact the air con man !

 

You can shut off just the A/C without shutting down the rest of the heating ventilating system using the A/C "off" button. If the light remains on, your car has a malfunction.

 

yes but it does nothing! the light stays ON

 

I have the same problem on an '03 S600. The red light is on and stays on no matter what I do. I could only find instructions on how to get diagnostic on a w210 chassis. Anybody know the procedure for diagnosing through the push buttons on the climate control for the 220's?

 

Where are you located at have this problem 484-843-3899 nick

 

[QUOTE=nickss55;6094841]Where are you located at have this problem 484-843-3899 nick

 

My Issue is solved:

I was having EC light on in my 2002 C-Class so compressor stooped working...
I added gas but still light is on...
I made doaa (prayer) to allah to help me solving this problem.

Then I opened the front panel and removed the AC unit out and unplugged it from the wire harness.
Then I opened the unit itself and cleaned it by air then reconnect it again.
Then it is worked and the light goes and compressor started again...

alhamdulellah

 

Well, I think you probably cleaned the charcoal filter by blowing it out. Good going!

 

on a 2003 Mercedes' sl500 the button says ac off if the red light is on the ac is off.

 

on a 2003 Mercedes' sl500 the button says ac off if the red light is on the ac is off.

 

If the AC red light stays on no matter what, it is an "unrecorded " error in the software, that can be fixed.
Search my statements on this here and "there" under my nick.