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3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

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Old 09-18-2004, 10:14 AM   #1 (permalink)
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I have followed the very easy instructions on the DIY Climate Control Fix as detailed by Richard Swope at www.macadamizer.com.
However after reinstalling the unit only the button lights work and nothing else.
I have checked all the fuses I can think of.

I'm wondering if anyone else have done this procedure and what problem they've encountered if any.
How carefull do you have to be in taking the existing capacitor out?
Is it easy to "screw up" the board?
I have also installed a 47uF capacitor and not a 0.47uF. Does this make a difference?

Anyway, I'm trying my best not to purchace a refurbished unit at the dealer for $570CDN.

Any advice would be appreciated.

1996 318i
81,000 kms
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Old 09-18-2004, 12:04 PM   #2 (permalink)
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I have never worked on the climate control unit, but based on general electronics experience you should use a capacitor that is closer to the .47uf recommended size. The size difference between .47uf and 47uf is really large and could account for the problem. If you can't get a .47uf, get a1 or 2uf and you should be fine as long as the voltage rating is around 50V. Also, make sure your polarity is corrent.
Take the board out again and look with a magnifying glass to see if all the metal traces around where you worked are intact and that you didn't bridge any traces with excess solder.
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Old 09-19-2004, 12:16 PM   #3 (permalink)
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I did this fix a few months ago and I had no problems.
I think you should stick to the 0.47uf. You have to be able to find one somewhere. Also, I'm not sure how much of a difference it makes (because I am not an electronics expert) but if you have a polarized capacitor you need to make sure it's installed in the correct orientation. That's about it.
I didn't feel too comfortable soldering my capacitor to the board so I found someone to do it for me. He only charged my $15.
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