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  #1  
Old 07-07-2007, 08:24 PM
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1997 S320 A/c Ec

I have a 1997 S320- the EC light remains on and, as a result the AC compressor does not go on. Is this because of low refrigerant level OR a bad relay? If it is a bad relay, which relay operates the compressor? Klima?

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Old 07-07-2007, 10:12 PM
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What is the EC light and how do you know that this light is related to a/c control ? There are a lot of components that combine to control the compressor, and if you have the Klima relay like I have on my 87, 260E, then there is a step by step process I have posted to test the compressor circuit.

ac still not working after ac conversion 87 300SDL
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Old 07-07-2007, 10:33 PM
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See this one too - 210 chassis climate control problem
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Old 07-09-2007, 12:50 AM
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The EC switch turns off the compressor to revert the system to regular ventilation (no a/C). If the light stays on, your refrigerant charge is low, it is a failsafe mode.

Now, I just hope yourrefrigerant level is not low because of a leaking evaporator...

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