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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 01-08-2004, 05:58 PM   #1 (permalink)
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I'm still having problems with my heat but iv narrowed it down. I replaced the heater control unit. But that did nothing, it wasnt broken in the first place. And if you listen really close you can hear the actuall valve switch from hot air to cold air, so thats not broken. I now have no clue as to what it can be. Its not the speed switch because that works when the a/c is on. Anything?
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Old 01-09-2004, 10:53 PM   #2 (permalink)
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So no ideas. What other parts are there to the heater in a BMW. More sensors and relays im sure.
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Old 01-09-2004, 11:12 PM   #3 (permalink)
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i really hated HVAC dude its not my best field sorry..
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Old 01-09-2004, 11:36 PM   #4 (permalink)
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Quote:
Originally posted by Old528e@Jan 8 2004, 07:38 PM
I'm still having problems with my heat but iv narrowed it down. I replaced the heater control unit. But that did nothing, it wasnt broken in the first place. And if you listen really close you can hear the actuall valve switch from hot air to cold air, so thats not broken. I now have no clue as to what it can be. Its not the speed switch because that works when the a/c is on. Anything?
By saying "heater control unit" I am assuming you mean the heater valve in the engine bay. I believe I said in an earlier post that the vehicle has 2 seperate blowers(one for a/c and one for the heater). If your blower does not work when the a/c is off, then you have a bad blower.
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Old 01-10-2004, 04:29 AM   #5 (permalink)
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By heater control valve i mean the temp knob. And I only have 1 fan that i am aware of. It is in front of my shifter. Iv taken the casing out and there is only one fan present. Unless there is another fan under the hood. That could be it, i will check.
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