w204 air conditioning light blinks

sceh

Active Member
Joined
Jul 31, 2015
Messages
143
Car
w123 240TD
Yesterday I pressed the aircon button and it blinked three times then switched off. Tried a few times. One hour later I tired it and it worked perfectly. This is the second time it has happend (last time two years ago). Seems not to be the gas level otherwise it would not work and blast ice cold air.
I have the full WIS/ASRA/EPC system but can find no diagnostics or explanations or anything.

Any ideas? Or any ideas where I might find it in the system?

thanks
 

paul73mt

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Jul 18, 2012
Messages
677
Location
Essex
Car
2010 C350 CDI Sport sold , 2015 E250 CDI AMG Line Sold
is it under module's climate control???
 
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sceh

Active Member
Joined
Jul 31, 2015
Messages
143
Car
w123 240TD
No mention of troubleshooting at all except for checking if the system leaks and this is a huge job. SInce this light blinking is mentioned all the time and for every Mercedes nearly, i am surprised they don't tell us what it means
 

MancMike

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Joined
Jul 29, 2014
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0
I had exactly this fault, flashes 3 times, then off.

It was the air con pressure sensor. Either you've lost pressure, or the sensor is faulty. For me it was the sensor. It was about 70 quid for a new sensor, fitting and full vac and regas cost me about 130/150 ish.
 
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sceh

Active Member
Joined
Jul 31, 2015
Messages
143
Car
w123 240TD
Thanks. I checked the manual and the most complex thing is draining the aircon system. I could send the pages if there were bigger limits on the files sizes but it is 1.6mb with pictures. Send me you email if you want it
 

MancMike

New Member
Joined
Jul 29, 2014
Messages
0
I don't want it, I had the same problem you're experiencing and had it repaired, a couple of years ago.

I was telling you what the problem was when I had it.
 

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