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3-Series (E46, E90) Chat relating to the BMW 3-Series from 1999 to Current. Models include: BMW 316i, BMW 318i, BMW 318Ci, BMW 320i, BMW 323i, BMW 325i, BMW 330i, BMW 328 Ci, BMW 328i, BMW 325i/xi, BMW 330Ci, BMW 320d, BMW 330d, BMW 335d.

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Old 08-15-2006, 11:56 AM   #1 (permalink)
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My Climate Control is going crazy!!!

Hey everyone, it's been a while since I last visited the forum. I wanted to seek some advice:

As of a few months ago, my Climate Control would change speeds sporadically when it was running. It started off minor, with small variations in fan speeds. The changes in speed would usually last from 1 second to 3 seconds.

About a week ago, it started really acting up. Now it will jump to max speed and then stop completely and then "hickup" in speed sporadically almost constantly, no matter what setting I have it on, or what temperature.

What could be causing this, and how do I fix it? Do I need to take out a second mortgage on my house and sell my illegitmate children to fix it?
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Old 08-15-2006, 02:16 PM   #2 (permalink)
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End stage motor - Total cost with labor.....225$

End stage resistor - Total cost with labor...105$

Take your pick. Mostly its the End stage motor. Quite common in E46 after the 5th year....if you browse the forums youll find tons of references.
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Old 08-16-2006, 08:57 AM   #3 (permalink)
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Also referred to as the "Final Stage Unit". Located somewhere behind your glove compartment. Mine's due for a change too.
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Old 08-17-2006, 12:04 PM   #4 (permalink)
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Thanks guys. Would the end stage resistor be included in the motor? In otherwords, if I replaced the motor for $250, would that also include the resistor, or would I have to replace that seperately?

I don't want to replace one, and then find out its the other.
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Old 08-17-2006, 12:06 PM   #5 (permalink)
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PS,

Is this something that I could replace myself and save some $$? You mentioned that it's behind the golve box. Is it fairly accessable with hand tools, or would be a lot easier to just take to Mr. Mechanic and pay the labor charges? I'm pretty mechanically astute, so I'm not affraid to get in there with a wrench.
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Old 08-17-2006, 12:41 PM   #6 (permalink)
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Supposedly a bit of a pain to reach, but yes a DIY job. Search the forum for "final stage unit" and if needed, PM 325isBaby for more info. She's covered this topic before. If you have a Bentley manual, that would help.

My understanding is the resistor and the motor are separate items.
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Old 08-17-2006, 01:43 PM   #7 (permalink)
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Sounds to me like the final stage unit has gone bad...it's a really common concern with BMW's of all makes. It is a bit of a pain in the rear to reach but it's an easy enough DIY.
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Old 08-17-2006, 06:15 PM   #8 (permalink)
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Anyone know where I can find this DIY link? I just found a brand new unit on Ebay for $70.
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Old 08-18-2006, 07:29 AM   #9 (permalink)
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Don't bother with something from eBay. You can get it new from bavauto.com for $71. Visit their site and search for "final stage unit"... it'll pop right up.

I don't know that we've ever had a DIY to describe replacing it. But like I said, the Bentley manual covers it.
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Old 08-18-2006, 05:07 PM   #10 (permalink)
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Thanks Hootie. I'll check out bavauto.com. I didn't see any mention of the Bentley manual in this thread. Where would one procure said manual? Thanks.
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Old 08-18-2006, 09:38 PM   #11 (permalink)
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Quote:
Originally Posted by Ocean02
Thanks Hootie. I'll check out bavauto.com. I didn't see any mention of the Bentley manual in this thread. Where would one procure said manual? Thanks.
Amazon.com -- free shipping

(Although you can also get it from bavauto.com, though for I higher price, I believe)
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Old 08-22-2006, 11:43 AM   #12 (permalink)
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You guys wanna hear something wierd? I get up on Monday morning to go to work and my battery is dead. It never had any problems before, so I was a bit confused. I get my cables and jump-start it with my buddie's truck and then it's fine. However, the "Service Engine Soon" light comes on. All day this light it on, until about 5pm, when it just turns off. The battery seems to work fine now.

I noticed that when the car is not running the AC blows anyway, when I'm in the car. Is this normal? Should the AC continue to blow and sputter when the ignition is off? Could this have caused my battery to drain?
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Old 08-22-2006, 09:38 PM   #13 (permalink)
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Um once the key is off (as long as you are not in accessory mode) nothing should continue to run.
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Old 08-24-2006, 07:22 AM   #14 (permalink)
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Ocean, you're car is possessed. Proper disposal of a 3-series is the same as the American flag: burn and salute it... then go out and buy another.

Don't suppose you tried to check the stored error codes in your car to see what the SES light was all about?
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Old 08-24-2006, 04:18 PM   #15 (permalink)
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Final Stage Resistor

I just did mine last night with great insight from the follwing DIY. Definetly solved the problem ~1 hour and $63 for the part.

HVAC Fan Speed - Weird - E46Fanatics

Its post #7 in there...
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