ec always on - Mercedes-Benz Forum

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post #1 of 4 (permalink) Old 04-11-2011, 04:40 AM Thread Starter
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Date registered: Apr 2011
Vehicle: 2001 c 180
Location: east midlands uk
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Hi! I have a 2001 c180 and just the other week the ec light came on and will not go off! I searched around the net and was told it may be a sensor, but where is it, and how can i tell if it is?
I found this but as can see the link does not work

RE: Auto AC Climate Control - Can't turn EC mode off
Somewhat common problem I think. All the details are here - http://www.*****************/shopfor...threadid=86110

Especially read the second page.

I would if i could does anyone know the full address please.
I did take it to a garage, and they said, it needs new compresser that was without even seeing car!
anyway hope someone can help

Last edited by poadmode; 04-12-2011 at 11:40 PM.
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post #2 of 4 (permalink) Old 04-11-2011, 09:59 AM
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EC light usually means your refrigerant is low and the compressor will not turn on as a measure to protect it. My best guess is you have a leak so the thing to do is to locate and fix that then have the system recharged.

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post #3 of 4 (permalink) Old 04-11-2011, 02:22 PM
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Last year, my AC was running fine (EC off) then suddenly the EC light turns on, it was the evaporator temperature sensor gone bad. If I remember correctly, it cost $40 and took 30 minutes to replace.
You need to run diagnostics to see the error code then you know what's really wrong.
Search for "ac diagnostics" and/or "evaporator temperature sensor".
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post #4 of 4 (permalink) Old 04-12-2011, 02:14 AM Thread Starter
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Date registered: Apr 2011
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Thanks for info, I searched both this site and googled for info re pulling ac codes. My car has the "luxury AC?" or maybe called digital console? no readout on it and EC and REST button combined just got buttons and 2 dials for temp one pass side other drivers side.
I still need to know if there is a way to pull and reset codes without using STAR tool. I need to get codes reset so compresser will run so recharge can be done and recheck fix leaks. Please help, this is driving me crazy!!
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