+ Reply to Thread
Results 1 to 6 of 6
Thread: Heater blower motor
05-23-2011 03:55 PM #1
Heater blower motor
Iím still having probs with regard getting my heater blower motor to work on variable. Iíve replaced the transistor on a number of occasions (even upgraded it) which has only lasted 6 months max. This time I made sure the soldering of the transistor was the best it can be and cleaned everything up until it sparkled to avoid dry joints and still it failed. Anyway, Iíve now replaced the blower motor itself on the assumption that the brushes are shot and low and behold, the a/c and heater still only operate on full. Somebody on this forum has said that the prob is likely to be the blower select relay which is found behind the centre console. Is there anybody out their who can talk me through how to remove this bit of fascia and what to do to make the repair??
Thanking you all in advance
06-20-2011 04:31 PM #2
06-21-2011 06:58 PM #3
06-27-2011 07:30 PM #4
I can help you with some of your questions. After a 3 year quest I finally solved this problem on my car. But it's way too
long for me to type it out, so you'll have to give me a call. The bad news is that you'll be doing R&R of the R-12 or R-134A, as you have to remove the blower box from the console. This neccesitates opening the system. At least on my problem anyway.
Steve Lake (941) 376-2188
06-30-2011 08:06 AM #5
- Los Altos, Ca,Member No: 120103
- Join Date
- Jan 2005
- Rep Power
I had the same sort of the trouble with the variable speed on the heater, and also tried replacing the transistor. Also for me the fix lasted only a very limited amount of time. I then tried replacing the entire steel 'board' (with the transistor and other parts), and have had no trouble since. Being an electrical engineer in a former life, when replacing the transistor I noticed that there are a couple of other parts on the 'board' that could also fail, and yet I was replacing only the transistor. If one of those other parts are toast, then the transistor will probably not last for long.
Perhaps prior to going any further into the intimate bits of the heater system and tearing your dash apart, you may want to get a replacement transistor board and see how that goes. I think I got mine from Autohaus AZ and it was not tooo expensive.
Good luck -- Roger
06-30-2011 08:16 AM #6
rogerh113- That is some very good advice! I replaced just the transistor twice, each time lasting just about 1 year. Luckily a good friend is building a E24 race car, and gave me the transisitor out of his. Although it didn't solve my problem (still needed the one down by the blower box, which he also gave me), the factory transistor he gave me still works years later.
Users Browsing this Thread
There are currently 1 users browsing this thread. (0 members and 1 guests)
By John Jay in forum BMW 2002 Forum (E10)Replies: 8Last Post: 02-23-2001, 06:07 PM
By fletch in forum BMW 2002 Forum (E10)Replies: 1Last Post: 02-06-2001, 10:21 AM
By j.thadeus toad in forum BMW 2002 Forum (E10)Replies: 2Last Post: 11-06-2000, 03:35 PM
By Karl Krumrey in forum BMW 3 Series Forum (E21)Replies: 1Last Post: 10-16-2000, 11:15 AM
By John Russell in forum BMW 5 Series Forum (E12)Replies: 1Last Post: 09-04-2000, 11:51 AM