Hey I really need help with my A/C. I have a 2003 BMW 325i that i purchased a few months ago and i've been trying to fix the a/c. I have replaced the drier, the compressor, i have checked the relay and all the fuses. Everything is great. However, my A/C auxillary fan never turns on(also known as the pusher fan). I thought the fan was bad so i bought a new one and it still does not turn on??? I have no idea what the heck is going on??? My A/C does not work and I live in Florida. I have done everything possible that i could think of. The new compressor works because the shop that put the freon in kickstarted it by putting 12 volts of power into it and it turned on. I tested the plug that goes into the compressor and it's not getting any power. So something is telling the computer to not give the compressor the 12 volts of power it should be getting. I really need help. I'm very mechanically inclined and i know the bmw e46 engine like the back of my head but this is just killing me that i cant figure out what this is. I went back to double check all the connections and everything is perfect. no leaks at all.
Update:Excuse me saying freon lol. I'm an HVAC tech. Yes it was R134a refrigerant. One of the answers said check the fuses. In my question i stated that i looked at all the fuses and all are good. I even checked the relay for the A/C behind where all the fuses are.
Answers & Comments
Verified answer
Maybe the something stopping the 12 v is a blown fuse.
It sounds like A/C high pressure switch is bad. This is the sensor which connected on top of the A/C dryer. Once you vacuum the freon, remove the right side fog light to have access to it, instead of remove the front bumper. Alternatively, remove the headlight but you will need a trim removal tool.
Bmw E46 Ac Compressor
I hope they didn't put in FREON because your car takes R134 refrigerant. Try checking the low pressure switch.