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BMW 5-Series Climate Control Questions

15 messages,  Last post on Jun 25, 2008 at 9:12 AM

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What is this discussion about? BMW 5 Series, Heating / Cooling, Sedan

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#1 of 15 Air Flow to Defroster by drrhawk Jan 08, 2007 (11:39 am)
I have a 93 BMW 525i. The problem is no air flow from the defroster and low air flow from A/C and heater. The blower is going full force and controls seem to work fine. No obstructions, etc. However, when defrost is selected, heat radiates up but no air flow is directed to the defroster vents.   Any help with a solution or diagnosis would be appreciated. Replies to this message: tsweber (Jun 23, 2008 6:50 am) cindih (Jun 23, 2008 9:36 am) malone2 (Jun 23, 2008 4:27 pm)
#2 of 15 harley94 by harley94 Feb 03, 2007 (2:57 pm)
I have 95 BMW 530I. It has dual climate control. It blows cold air on drivers side. I've replaced the control valve on the firewall. Not the problem. Any ideas would be appreciated.
#3 of 15 '94 525i BRRRRRRRRRRRRRRRRR by malone2 Feb 08, 2007 (9:07 am)
I bought my '94 525i from a close friend in '99 and she sold it because of the heater. Well I let it go until now and this winter in Mn is one of the coldest. My question is: minus 15 and below there virtually is no heat on the floor, a little coming out the front and a little defroster. Always had been and enough is enough. Of all my cars I owned this ranks #1 for poor heating. Am I doing something wrong? Is there something I don't know about? My Classic '58 Chevy has a better heater! Other than that ...Excellent car! No major repairs since I owned it. Any help would be MOST appreciated! Yours truly, Frozen! (John) Replies to this message: harley94 (Feb 17, 2007 5:25 pm)
#4 of 15 Little to no heat by drrhawk Feb 08, 2007 (7:44 pm)
Have you tried replacing the cabin air filter? This filter, if clogged, reduces air flow, therefore, heat, etc.. Replies to this message: malone2 (Feb 09, 2007 3:17 am) drrhawk (Feb 10, 2007 3:31 pm) malone2 (Apr 26, 2007 5:37 pm)
#5 of 15 Re: Little to no heat [drrhawk] by malone2 Feb 09, 2007 (3:17 am)
Replying to: drrhawk (Feb 08, 2007 7:44 pm) OK..........and where is this cabin air filter located. I will check the manual alos. I will get back to you. Thanks JOHN Replies to this message: drrhawk (Feb 10, 2007 3:31 pm)
#6 of 15 Re: Little to no heat [malone2] by drrhawk Feb 10, 2007 (3:31 pm)
Replying to: malone2 (Feb 09, 2007 3:17 am) If you have one, the Bentley manual tells where it is, and how to replace it. The procedure is too complicated to describe here, but the filter (in the 93 5 series) is behind the heater core, next to the A/C condensor. All air distributed inside the cabin must pass the filter, which, if clogged, drags the entire system down. BTW, your local library should have a Bentley manual.   Hope this helps...Good luck.
#7 of 15 Re: '94 525i BRRRRRRRRRRRRRRRRR [malone2] by harley94 Feb 17, 2007 (5:25 pm)
Replying to: malone2 (Feb 08, 2007 9:07 am) I had to replace the heater core. It heats great now. 1200.00 later. I think that is what you are going to have to do.
#8 of 15 heater by georgebitar Feb 26, 2007 (1:03 pm)
I agree with having to replace the heater core. Thanks, George Bitar Replies to this message: malone2 (Feb 27, 2007 9:54 am)
#9 of 15 Re: heater [georgebitar] by malone2 Feb 27, 2007 (9:54 am)
Replying to: georgebitar (Feb 26, 2007 1:03 pm) Hi George: So when you need to replace a heater core is that because there is NO heat at all or? Right now I smell a faint odor of antifreeze in the car, so does that mean the core is going? I have heat but not much air is coming out and yes I know it probably is the cabin filter. JOHN
#10 of 15 Re: Little to no heat [drrhawk] by malone2 Apr 26, 2007 (5:37 pm)
Replying to: drrhawk (Feb 08, 2007 7:44 pm) drrhawk: Well I finally got to replacing my cabin filter and WOWWWWWWWWWWWWWWWW what a difference. It actually has alot of force of wind. It hasn't worked this good in years and I have you to Thank for it. YOu were the first one to tell me about it. I did replace it myself and it wasn't that bad. Thanks again JOHN   ps Now my gas gauge stopped working but I know I hAVE full tank.

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