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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 05-10-2016, 09:46 PM   #1
Registered User
Join Date: Jan 2016
Location: Dominican Republic
Posts: 28
My Ride: BMW E46 330i
How I fixed my air conditioner issues

Today I want to share my experience in how I solved my ac issues, I am owner of an E46 330i (2002 EURO).

As I saw in many threads that some people be grateful for how they got help from all this data base that is e46Fanatics, I want to do the same, thanks for this wonderful forum, thanks for you guys who save tons of money in our pockets.

My ac was blowing warm air in the middle vents and hot air in the windshield and foot-well, during the day in the highest point of the sun it was impossible to have the cabin in a comfortable temperature, at night the ac was more of less comfortable.


To me use the logic when you have problems with your e46 is vital, you need read, investigate,if you canīt do many thinks in the mechanical field a less learn in the theory mode, I am only have OBD fusion in my smartphone to read generic codes, not too much tools to work, just some old tools when I used to have my E36, my last acquisition was the 32mm wrench for the fan clutch sometimes I can not get to deep cause limitations of a good scanner.

Well letīs get to the point in this mess,

HAVC: remove and disassemble HAVC , clean all the dust inside the unit, the fan was full of dust, greased the metal axis of the fan with white lithium grease and clean circuit with contact cleaner, assemble again an install it.

I could feel a better improvement in the temperature but still no happy, hot air from foot-well and windshield yet there.

Fuse # 63 and the ac compressor: weeks later, fuse #63 was blowing, it doesnīt matter how many time I change it, keep blowing, I contacted with trusty mechanic, he told me that the coil clutch in the ac compressor have problems, 50 dollars to change this part with I used one then I decided to research by myself, 3 weeks without ac, the worst thing in the world is when is raining and you donīt have ac.

The thing is that I decided to check the electric connectors of my ac coil clutch, surpriseee!!! , the positive wire was bare touching (making ground) with the external body of the ac compressor, tape it, issue solved, fuse #63 never blow again.

Heater valve: the last weekend I removed the heater valve to open and check the internal seals, they where shot, glad to see that maybe the valve was the problem of the hot air in the foot well and windshield, Bought a used heater valve through eBay, 14 dollars (free shipping).

Installed it, test it, ac works like a charm.

I like when I solve issues in my E46, I am not a mechanic, I donīt know anything about electricity but I have the spirit of do the things of the best way with logic, professionally , my maternal language is Spanish buy I am here with just a few knowledge of English and sharing my experience, I hope that with this thread I can provide help as I already received it from others in this forum.

When you have a BMW you have to be a engineer, scientific, researcher, everything.

Thanks again.
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Old 05-10-2016, 10:32 PM   #2
Registered User
Join Date: Sep 2011
Location: TEXAS - Circuit of the Americas doing laps with my CTS-V and coming in for a pit stop.
Posts: 3,046
My Ride: 03 325iT SportWagon
Congratulations on fixing your AC!

You have to be inventive to fix your E46.

You said it right, "When you have a BMW you have to be a engineer, scientific, researcher, everything." Well said.

I do not recommend the E46 to my friends if they can't do everything.
BMWCaptain is offline   Reply With Quote
Old 05-12-2016, 09:28 AM   #3
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Join Date: Dec 2006
Location: Central New Jersey
Posts: 968
My Ride: 330i ZHP
Goo job on fixing the AC, Your are correct this forum is a wealth of information and has saved me a ton of money in the years I have owned a BMW. Just recently my fuel pump failed, fortunately in my driveway so I didn't get stranded on the side of the road, but with the knowledge that I have gained from this site I was able to diagnose the problem and replace my fuel pump with out having to bring the car to a mechanic. I am not sure how much a mechanic will charge for a fuel pump replacement on my car, I am sure well north of $500, so I was able to save a significant amount of money doing it myself.

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raptorman5174 is offline   Reply With Quote

ac, fuse 63, heater valve, hot air blowing, hvac

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