From one problem to another. I had a small freon leak so I did a R134 recharge about a week or so ago and everything went fine. The leak was due to a loose hose and it was tightened. Everything was going great until recently when the "EC" light turned on and stayed on. I did some search (as much as I could b/c the search feature seems to be messed up) and saw that if you held the button down for 10 seconds you could override this. I did that just to see if the air would blow cold. It was cooler than it was before but not like it has been running for the last couple weeks.

Is there anything I can do to figure out why the EC light stays on? I would like to do some investigating before I take it to someone to checkout b/c I don't want to end up getting ripped off. I know its on for a reason so I don't want to risk further damage to the climate control system by just overriding it everytime. I was trying to find instructions on Climate Control Diagnostics but the search kept taking me to an error page.

Thanks

PS: Its a 1996 C280 with 120K miles on it.

__________________

2004 CLK500
2000 S500

Here are the Results I got from the Climate Control Diag. (This was with the EC button off):

01 - 98F
02 - 92F
03 - 104
05 - 100
06 - 199
07 - 14.9
08 - 12 2
09 - 44F
10 - 50 5
20 - 02.0
21 - 070
22 - 000
23 - 100
40 - 01
41 - 03
42 - 00
43 - GAS?
50 - 102
51 - Lo
52 - 41F
54 - OFF

__________________

2004 CLK500
2000 S500

See 210 chassis climate control problem, especially the second page. May or may not be your problem since you did say you had a leak. I didn't, but that sensor is a common problem.

Len

Evap temp sensor reads 100? Looks like the evap temp sensor is a potential culprit.

__________________
John Shellenberg
1998 C230 "Black Betty" 240K

http://img31.exs.cx/img31/4050/tophat6.gif

well this reading was taken while the car was freshly started and sitting in a parking garage so I am not sure if they are accurate. I think I still have a leak somewhere b/c when I override the EC button the hissing sound comes out of vents which is the noise that first lead me to a leak.

__________________

2004 CLK500
2000 S500