Thanks man!!!! My AC works now!!! I can't believe I didn't try this. I was without AC for almost a year and a half (I live in SC) so you just don't understand how much this video helped me out. My problem was that my wiring harness was corroded and prevented power from going to the fan. So I went to a local junk yard and replaced the harness. Shortly after that my AC started to work again.

This was a masisve help!!! I'm having all the same exact issues in my 99 528i.. I have no leaks but recharging only works for a day or 2 so I'm looking everywhere

Great vid so clear on explainstion my a/c on my E39 stopped working & right now on UK were hitting 34 by midday crazy heat for us

Thanks for this. AC problems often become a game of whack-a-mole, just like yours did. I've been there, and not just once.

Awesome info. Thanks so much!

Fully appreciate your video, thank you - keep em coming

Amazing video, I drive an e36 and this helped me out a ton.

you are wrong, if you hard wire the ac compressor clutch and you hear the click sound that means the ac compressor clutch works but that can not tell you that the compressor is working.

Hey Mr.ADK25: Thank you for making detailed DIY Vids for troubleshoot A/C issues with your Bimmer (Even though it was 7 yrs ago!! My 2000 E39 540i A/C has not worked since buying the Car in March 2015! I'm only getting around to try and get it working because of the extreme Heat/Humidity that We had all of July '18 into Aug '18!! The main things I've tried so far was: making sure that all exposed Metal Lines were not corroded and the bolts all tight, next I check all the Fuses associated with the A/C Unit, next I also went and bought a similar recharge Can with Gauge to see if my "Freon" was low, but I hooked the Can to my Low pressure line and the Gauge showed that is was on the low side, but I only injected a very small amount, before the Gauge needle suggested I had enough Freon! So, I think it might be the Compressor, so that will be the next component to check..;-) I'll keep you updated, if I get it working again!!

thank you for your video so much you have no idea how you help me today i bought a car that was damaged on the left front and sometimes the a/c works but after watching your video im gonna go see if i can find thant sensor under the hood in the front of the car thank you very much

If your blower doesn't work try the blower resistor switch, on the 325 it is below the glove compartment to the left.

Thanks so much for posting this!

IMHO your a/c wasn't working because it was low on gas [the R134a refrigerant which you put in]. The a/c system has low and high pressure switches in it so if you are low on gas it won't start up . by the way Freeon is rather dangerous for the environment whereas R134a is not . Air con will lose approximately 5-10% a year in tiny leaks and its also worth bearing in mind that the oil in the system is mixed in with the gas. That is why its a good idea to use your a/c at least once a week as it keeps all the seals and valve etc nicely lubricated . If you are checking for leaks on your a/c system a good thing to start with is looking for oily greasy residue on pipes,joins and particularly on the a/c rad which is right at the front of the engine bay ....in front of your water radiator. Other than that its all good .

you are a good instructor, good and informative video. thank you!

Very good video. Connected the AC directly to the Battery and saved me alot of time and AC replacement. Figured it out. Thanks for the great video :)

Red ac cap is the high side(liquid line) blue cap is the low suction side(vapor side. And it's not freon, but refrigerant.

thanks so much, my cold was coming from one side like yours, thanks heaps in identifying the issue

Super helpful! Thanks man!

I just got my e39 2 days ago. I don’t know much about bmw, or even cars in general sadly. My car just blows heat. There is no ac at all. I’m going to buy some Freon and hopefully it helps

Helpful af. Thnx broski

My 530 temp reads minus 40 and AC works just fine. 😉 So, not necessarily. I know my ambient temp sensor fell off but who cares, AC is just fine. 😉

Hi, i've got a similar issue on my 1996 520i (the older European type). Comp not starting etc... However, when i checked on the plug that goes into the compressor, it read 13Volts and when i put a battery to the compressor, it did engage. I can't understand how it seems to be getting the voltage up to the compressor but not starting up. Any ideas?

ADK, I did read your response that you are color blind. Good info with one important clarification... as one of the comments noted, you pointed out the high pressure RED nipple. The low press. nipple used to fill with the refrigerant R-134 (R-12, also know as the brand Freon is used in older cars generally pre-1992 in German cars) is the nipple at the firewall closest to the windshield (from high pressure nipple, follow thick tube back toward windshield . Sometimes identified with a BLUE cap.

I would first start off and replace the temp sensor . If that does work then you might need to add some freon. If that doesnt work then its the compressor.

Superb video, really helpful. Many thanks

That's the same issuing I'm having with my e39, cold air comes only from the driver's side vent but passenger side is warm.

Thank u so much. This helped a lot.

At 4:30 the valve with the red cap is the liquid line / High pressure Not the low pressure

Interesting but recommending a sealant for the a/c system means even a minor repair using a shop may require a complete replacement of the system due to the sealant interfering with the shops a/c service machine.

One of my AC fan line is Burn the Black wire, I replace it, well I took every line out just to make sure , I try to figure out where can I get a new fan wire connector.

Hi, Thank you for the video. I have 03 BMW 530i. Suddenly the fan is'nt at all blowing then took the car 2 Christine Bro. Lady mechanic tapped under the glove box then started working perfectly for few months. 2 days back I used a Sudden brake because 1 guy wants 2 turn suddenly to left from the rightmost lane. Y'day fan stopped working. I tried tapping under glove box but still nothing happens.

Thanks, I have the same issue.

Bro where did the black wire that you connected to the battery come from

thanks for the info. i take it back to the shop and the guy told me the ac compressor is shot and thats why the fan not coming on.

Great info, Thanks

I need help, My E70 X5 4.8i Aircon is not working. I Changed the Aircon pump, checked fuses if were not blown but still my aircon pump does not want to turn on and also the control panel is working...what could be the problem? please help I have tried everything

great video .... thanks

on E36 the 3 wires to the AUX fan aka AC fan = brwn/ground one= LOW and other HIGH speed. So the fan wire to pc sounds a little weird.

My temp sensor is bad but still blows somewhat cold/warm. Will replacing the sensor rectify this

Also observed minus(-)41 degrees temp displayed. But when park the car for a while & restart the engine suddenly hot air is coming from the vents for a few minutes and then again stops. Please comment or suggest.

@UsKjoe1990 lol I am color bind .. So maybe thats why lol.. The computer wire is the skinny wire .

I am currently experiencing that the passenger side is not cold at all and driver side is blowing nice cold air. It sounds like I just need to recharge the system. Could you tell me how much do freon I need put into the system?

Good questions so what do you do after you hear the click? Can you start the car, will the compressor come on so you can add freon? My problem is low pressure and compressor shuts down. I understand that, but need it to come on to add freon. Thanks

I think my car's air condition resistance gone bad. I here sometimes voice: srrrrr, and it continues after the engine is turned off. Do you have any idea what that noice is? Ac is working normally and car runs normally.

Could be the fan motor needs to be replaced. Fuse ? or the wires are dirty and not getting a conection

You have said red but touched the green wire

Great video.

I put freon into the ac valve and the next day the pressure had dropped to nil and only hot air blowing. Does that sound like a compressor issue? Also, how would you check the compressor for clicking if the battery is in the trunk? Thanks

I have a 2003 BMW X5 E53 and when I first start car the a/c takes 10min to start blowing cold air(it's icy cold when it starts to work) I also notice the ac fan is deleting in turning on. Can the problem be a fan switch? If so where is located?

So you said that the red wire goes to the computer, and then you held the green wire and said the red wire is for positive battery charge... which is to the battery and which is to the computer?

Good morning, I have a 2013 528i, need to put freon,I cant find where to put it can you help?

Very helpful - Thanks

Dude thanks. Same problems with mine.

I have a BMW X5 e53 2004, and the aux fan stops working, i check the cable and still does not work, but when am on the highway and the car get cold again .. so maybe was the aux fan ... then........ all the aircon start to be hot regardless if driving on the highway or stops... i spend 700.00 the las time .. but i think this can be a minor fix... maybe is the fan clutch?

Hi on my 1994 bmw 318i my AC fan dose not work I put power directly to the fan and it turned so I think it my be the temperature switch, do you know were it connects to the engine, I now it is a 1994 but the temperature switch may be in the same place. or it could be the fuse do you know which fuse it is? your help would be appreciated.

I have a 1988 735i BMW and I need to know where the ac drier and the ac pressure switch is located . That is E32

my ac worked this morning then when i went to leave in the afternoon it stopped blowing all together. i looked under the hood and the compressor spins but does not click off and on like it should to work. what could be my problem? i'm hoping its just a relay but unsure where they are located and what one since i do not have the diagram. i have a 2003 325 xi PLEASE HELP!

hello I have a 2006 BMW 325i when I turn on my my ac, no cold or hot air comes out ...until after i run the car for a while it will blow very little air. any suggestions please

hi I'm having pretty much the same problem but my ac and heat does not turn on.i have had some days where it cut on but been off for a while now. What could be the problem

hello i have a 1997 BMW 528I i got a radio form junk yard and put it in and the clock works and i can set it but the radio will not come on can you help

Nice video and informative. Mine has a leak that my mechanic can not find. I have to bring him my car every year to be charged. How can I fix a leak? Where did you get the kit to install the double DIN stereo system? Do you have a video on how to install it?

Hi. I have a BMW 540i E60 2008. I was using AC today and after 30 mins or so, the cold air gradually turned warm and now it is a bit hot air. Please advise, thanks

Good morning!! The problem with my a/c is sometimes it blows cold and then for no reason at all it will start blowing hot air!!! I know it's an electrical problem because I can hit a bump and it will stop or start working!!! What do you suggest I do??

my radiator was damage.so the micanic take off the bumber to install the new radiator.now i find out my ac fan not spinning any idea what could be wrong?

YOU MIGHT WANT TO TRY REPLACING THE BLOWER RESISTOR FINAL STAGE UNIT, MY AC WAS DOING THE SAME TILL STOPPED BLOWING AT ALL,REPLACED UNIT AND PROBLEM SOLVED,ITS ABOUT 60 BUCKS, I WATCHED VIDEOS ON HOW TO REPLACE IT,ITS SIMPLE AND TAKES 10 MINS,ITS BEHIND THE GLOVE COMPARMENT ATTACHED TO THE CENTER CONSOLE

My ac just blows out hot air ,does that mean I can skip all the steps and just get that 30 dollar bottle?

nice video thanks

why my BMW 530D the auxilary fan never turns even there is air conditioner is on or the car runs on and off on the city? How do I test the fan is working good or not?

i have unplugged the compressor socket and put a test pen..i open the AC and its light up the test pen...and still got clicks sound.

Where do you wire the fan too?

hi im Daniel from Ireland and i will explain my situation with my e39 530d . i got the freon but when click on the air cond button and i twist the the fan control i can hear it very low and there is some pressure coming out but not enough. what can i do please thank you

I have a 530i 2006 BMW and the air conditioner hose is clogged and the water is leaking inside the passenger floor board. Do you know how I can unclog it?

bmw x5 e53 3.0d 2003 ac blows cold but compressor dont cycle and ac fan not running at all

E39 530 ac panel does not come on but the fan is constantly blow, what should i do (2002 bmw)

hi all, hope someone can help, i got my ac filled yesterday when i press ac button revs alter a bit but compressor wont kick in, compressor works hard wired, all fuses i no of are ok, 3 in glove box and 20amp one in engine compartment, is there something im missing that controls it. thanks mike.

I've only warm air coming from my AC. I've checked and I have enough AC coolant. When I turn on my AC the aux fan runs but the is no movement from the compressor. I put a meter on the single wire that runs to the compressor and there is 5 volts. Is that the correct voltage or should it be 12 volts ? Cheers buddy.

What radio dash kit is that?

So my issue is I start the car and turn a/c and it blows but not cold... then I drive the car and stop the car and start the car and now my A/c blows cold.....??? Any ideas boss?

What pioneer deck did you have in there?

Thanks for the informative video but I didnt get the part where u said about the wire colors Red is for the computer Black is Negative and Green is?? think u said Red again for positive instead of Green. Thanks

Hi, can you send me the link for the temperature gauge thingy you ordered on eBay? I have the same name and model, and my car also reads -40! Thanks!!

I have the same problem but on a 2011 535i. The passenger side cold as ice and my driver side blows warm air. You think I just need a charge. Thanx

Dude, Why didn't you check the refrigerant pressure in the system initially? So it sounded like you were initially low on refrigerant gas and hence the AC system would not activate due to low pressure. Hence the hot air coming out of the vent.

what year is your car? and did that steering wheel come with the car?

My a/c compressor is coming on but not blowing in cabin?

Im in ny by greenwich...get in touch if u do side work

my problem is not blowing from blower motor fan is working by radiator and compressor is kick on temperature is normal what next?

My 2005 BMW 330ci is not blowing cold air when Im trying to use the AC, and I add refrigeration , and ales changed the climate control and I still having the same problem, what else can I do to fix this problem? Can anybody help?

See my ac works but my high pressure makes a noise where it hides right where the wheel well is at

Everybodys having the same problem..im gonna try scraping the aux fan wires and connect wire&alligator clips.and see if the aux fan turns on and see if the compressor kicks in..if not im gonna hot wire the compressor with a wire&5amp fuse to see if the compressor kicks in..if not im going to add freon.and unplug the pressure switch and uhm check the fuse 75&76 and relays if i could find it..if i cant find the relays and fuses im gonna call the dealer everyday asking where the fk it is...

so the -40 reading is bad or good?

@UsKjoe1990 i am color blind lol maybe thats why . The computer wire is the skiny one.

I have a question , my dad broke my AC because he's an idiot and was picking at stuff and now my AC won't even change temperature , it looks like it's glitched with the air pressure , I'm not sure but the air is stuck at one temperature and no other buttons will work.

I did everything you did but the air not shoot ING out

Hey does anyone know if this will work on my 1997 540i?

excuse me my friend you said red is for the control to let you know is working and then you said black is for negative and red is for positive but the only wire left in your hand is green

Why did you type it 3times?

Bro I need your help my AC is not working how i can contact you ?

Your video did not help me my car is fully charged ,but the passenger side is hot and the driver side is cold. People said change the heat valve. And I change it and the problems still remain the same.

greenish liquid found it under my car?? can help me??...Carolina