[Kovacsbela]

Hello Gents,

I've got a 2003 CLK 240 (Euro) with the AC control without the LED display. I'm not using it too often and now when I was driving it I've found that the AC did not engage when I switch it on. The red indicator LED keeps on, and the compressor doesn't seem to start at all. It's the AC / OFF button, I assume it's maybe "EC" on US models, but not sure.

I thought it's the refrigerant that was leaking and indeed it needed to be refilled, but I do have the same issue even now no matter what I do....any ideas would be appreciated!

Cheers, Kovacsbela

 

[rudeney]

The system has a refrigerant pressure sensor so that if it's too high or low, it won't engage the compressor. You might have a refrigerant charge issue, or a bad pressure sensor. If you have a leak, you need to first repair the leak, replace the drier and the expansion valve, then properly evacuate and recharge, then try it.

 

[Kovacsbela]

Hi Rodney,

The refrigerator pressure must be OK as we just had it refilled. I'm still having the same issue. I tried to reset it, but since it did not stop the test cycle but repeated it over and over again, even after 5 minutes, I assume there is an "Error" which I couldn't read as I don't have the LCD version of the control panel.

 

[rudeney]

It may be time to get a tech with equipment that can read ACC codes to check it. A bad refrigerant pressure sensor could be at fault.