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I purchased an 01 E430 last May and had no AC problems at all last year. This season it only blows hot air. I added Freon to the car, which did not resolve the issue. I read the owners manual yesterday and noticed the EC light should be off when wanting ac on. This light will not turn off. Has anyone had this issue before? Please advise.
 

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You do not have enough refridgerant in the system for the compressor to kick on. It needs to be recharged and checked for leaks.
 

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The EC light also doubles as an MIL for the climate control system. If you can't turn it off, then there's trouble codes stored in the system. Those should steer you in the right direction.
 
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