A/C Problems. Please read. Hey WAYNE!!!

[944_S_type]

Hi.
I am having a bit of trouble, When I push my A/C Snowflake switch the green led comes on but the Compressor clutch never engages. The Elec fan does not turn on either. I have been doing a bit of research but I have not found much. I believe that It can possibly be the High/Low pressure cutout switch. But Does anyone have some things to troubleshoot. And even better yet, some elec values to test?

Thanks....

[Wayne 962]

Have you checked the actual pressures in the system? I'm not too familiar with AC systems, but I know that some compressors won't turn on if there's low fluid inside...

May also be related to temperature senders in the cabin / outside - I know that's a common problem on my 5-series...

-Wayne

[Wayne 962]

Have you checked the actual pressures in the system? I'm not too familiar with AC systems, but I know that some compressors won't turn on if there's low fluid inside...

May also be related to temperature senders in the cabin / outside - I know that's a common problem on my 5-series...

-Wayne

[93325]

I had the same problem with my 93 325i, took it to the local BMW shop and they said that when the freon level gets too low, it trips a relay that shuts off the compressor ( safety feature, they said)
So, they recharged the A/C. The fix lasted about 12 hours - next day no cold air from a/c. They had also put some fluorescent dye in it when they recharged it. So the second time I took it back, they checked it and said that dye had leaked out all over the top of the auto trans., indicating a failed evaporator. They want $1400 to replace it, but I am going to find a less costly fix, because I really love this, my first BMW. I now have located all the parts to fix it, but I would really appreciate a DIY article on replacing the evaporator, if anyone knows of one. Or even an article about getting deep into the stuff behind the dashboard. This forum has saved me a lot of money - I'm very grateful for this help. Tim

[944_S_type]

Cool,
I may just hit it with a can on R134+oil and see if the compressor turns on, if so ill have it evacuated, and a leak check done.