Hi guys, I have been having an A/C problem with my s500 lately, and I have already checked the encyclopedia and did not find the answer. The A/C blows warm air on warm days and the ac off light came on and would not go off. I pulled the codes through the A/C computer itself and got Error 1269(communication error in CAN bus with B31/1). I have had this code for several months, but the A/C just started blowing warm air. I also noticed that NR16, NR17, and NR18 all read "error". I have replaced the multifunction sensor under the hood with a used one and cleared the codes but it made no difference. Before I replaced the sensor I also noticed after I cleared the codes I could press the A/C off button and the light would go off and I would have cool, not cold, air for about 30 seconds. I am wondering if this could be a duovalve, another sensor, or the A/C compressor itself, as my car has ~140k miles. Any help is appreciated, thanks in advance!
2003 S500 error 1269
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I read through the climate control section and was unable to test the multi-function sensor(B31/1) due to the three values showing error. Could it be something else like the A/C compressor being low on oil (i read from another thread) or the duo valve or another sensor triggering the error to the sensor?
You can also read about A/C problems and the built-in diagnostics in the A/C control panel in the A/C and Heating portion of the W220 S-Class Encyclopedia, at http://www.benzworld.org/forums/w22...s-encyclopedia-start-here-2.html#post10079473
read the encyclopedia and other sources last night for about 2 hours and went out today and replaced the duo valve. didn't work. I've already replaced the multifunction sensor and that's the only code I am getting. could a bad compressor cause the sensor and a/c system to quit functioning? or is there another sensor or connection I am skipping over?
Did you ever figure out the fix on this?
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