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A/C stuck in EC mode
I have a 1997, SL500. The A/C is stuck in EC mode (light on). I have read quite a few threads about running the A/C diagnostic program. I turned the key on, set the temperature to 72, hold the Reset for 5 seconds. I can see the 1 and 78 flashing alternately. I assume that is the in-car air temperature.
I can't go up or down to display any other number. I have the single temperature unit. I tried the Auto button, up/down button, defrost etc.. Nothing seems to work. Is my unit defective or I was just pressing the wrong button? Thanks Bob |
Try the blower + and -.
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OK that works using the fan +/- button. Here is what I got:
1 - 75 2 - 67 3 - 73 5 - 73 6 - 80 7 - 4.7 8 - 71 9 - 37 10 - 125 According to http://pages.prodigy.net/jforgione/MB_AAC.html I don't see anything wrong. The AC system shows about 85 psi on both high and low side without compressor ON which is about the same as #7 (4.7 bar). Is this number (pressure) too low which causes the EC to be on all the time? |
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