Blower Resistor & A/C - BMW Forum - BimmerWerkz.com
3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

 
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#1 (permalink) Old 06-18-2010, 03:43 PM
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Exclamation Blower Resistor & A/C

I believe I have two separate problems here, so my main question really is if anyone knows if the two could somehow be linked.

First off some brief history since I'm a 'n00b':

I got my 325e in August 2009 for $2250 (now has 137,000 mi).

I've done some decent work on it already over the past year with the extensive ones being:

- In winter, replaced control arms/ball joints, sway bar links, and sway bar brackets.
- In early spring, alternator.
- Last weekend, starter (insane job, about 10-12 hrs).

Back to the blower/ac...

I noticed the AC didn't blow cold not long after I bought it last August. So, I figured at some point I would need to check out the AC. Then not long after I noticed the AC wasn't blowing cold air, the vent was only working when the vent dial was turned to "4". This is because of a faulty or dirty blower resistor. SOOOO....my question is: When I replace the resistor, is it possible my AC will blow cold air again??

I assume not, but when I have the ignition set to '1' so that the battery is turned on and I push the AC button, it lights up blue and I can hear the receiver dryer and fan turn on. I may need to recharge r12...........?



I APPRECIATE ANY ASSISTANCE!!

- PAUL
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#2 (permalink) Old 06-18-2010, 04:04 PM
OMFG another one!?
 
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Likely it needs new refrigerant, but leaks need to be hunted and fixed first.

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#3 (permalink) Old 06-18-2010, 04:05 PM
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The theory behind leaks?
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#4 (permalink) Old 06-18-2010, 04:08 PM
OMFG another one!?
 
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Most likely, leaks allowed the refrigerant to escape.

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#5 (permalink) Old 06-18-2010, 04:10 PM
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Right, ok.

I'm very apprehensive to convert to r134.

What is the best overall route (besides suffering in summertime heat) do you think?
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#6 (permalink) Old 06-18-2010, 07:18 PM
OMFG another one!?
 
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If at all possible, try to use the new type of refrigerant.

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#7 (permalink) Old 06-23-2010, 09:33 PM
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the real problem here is that

you have a crapped out 30 year old A/C unit in a BMW that really wasn't worth shit to begin with...that's the problem...you will never be able to fix this to your satisfaction..believe me....best of luck
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#8 (permalink) Old 06-28-2010, 03:57 PM
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Well I'll have to either get my hands on some R12 or re-convert it to R134. I'm not keen on vacuuming it. If you go that route, you'll be due for leaks soon enough.
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