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5-Series (E12,E28, E34, E39, E60) Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)

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Old 11-07-2004, 06:52 PM   #1 (permalink)
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Hello, I own a 525i in nice condition eith 191,000 I replaced the heat valves under the hood and replaced the Blower Sword also and I repaired the right side stepper motor mount that that was broken right off. I stil have heat comming out of the left center Vent sometimes just a little warmer than the right vent now today the knobs completely turned all way to cold setting still heat out of left vent? I have the model with the 3 control levers and knobs not the auto one thanks if you can help me the Bently does not tell you how to diagnose and I can understand electrical testing also. So please help If you can I don't like the dealers around here in Michigan except one. Thanks
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Old 11-07-2004, 07:48 PM   #2 (permalink)
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Duenevw: WELCOME TO THE BOARD!
Although you did repair some critical parts of the system here is what I think:

A. If air is blowing from the wrong vent (when not selected) then it signals a stepper motors problem and possible the control unit. AKA sword though you did relace but did you test it ?

B. If heat is blowing instead of the outside air then it points towards the heater valves being stuck open.

C. Also I would suggest a heater control simple test. Light comes on when you push the buttons, electronic switches AC light. In your case a dial knob does your fan work in all three speeds?

Hope this will help

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Old 11-09-2004, 02:57 PM   #3 (permalink)
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Originally posted by billB@Nov 7 2004, 08:48 PM
Duenevw: WELCOME TO THE BOARD!
Although you did repair some critical parts of the system here is what I think:

A. If air is blowing from the wrong vent (when not selected) then it signals a stepper motors problem and possible the control unit. AKA sword though you did relace but did you test it ?

B. If heat is blowing instead of the outside air then it points towards the heater valves being stuck open.

C. Also I would suggest a heater control simple test. Light comes on when you push the buttons, electronic switches AC light. In your case a dial knob does your fan work in all three speeds?

Hope this will help

regards
billb
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What is the proper way to test the heater valve operation I just spent 80.00 on a used heatervalves thanks Duane MI
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Old 11-09-2004, 04:53 PM   #4 (permalink)
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Duenevw
Try this link for further details
http://www.bmwworld.com/repairs/e24.htm

Hope it will help
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