The heating fan on my bmw e39 has packed in.Any idea what could be wrong with it?Can hear noises when i change controller but fan will not work on any setting?Fuses are ok but fan fails to activate!Any ideas?
FAULTY TEMP SWITCH ? THERMOSATE ? BASTARD 2 BLEED THE SYSTEM BE CARE FULL .TRY PUTTING A LIVE FEED STRIGHT 2 THE FAN 2 SEE IF IT WORKS ,FAILING THAT FIND THE SWITH MAKE A CIRCIT WITH A TEST METER DROP IT IN 2 BIOLING WARTER IF IT COONECTS YOU NO ITS NOT THE SWITCH ,HAS IT GOT A VISCUS FAN ?
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Did you check the Vacuum lines to the Secondary air Valve Controls. They may be rotten. Can you do a Smoke test. Replace dry rotted lines with either 3/16 Fuel or Power Steering Hoses if you do not get ORM Vacuum lines/hoses. There are many Vedios on You Tube showing this specific problem solving on German cars. you can check out these,
Secondary Air Injection Systems on German Vehicles
E39) 2001 BMW 525i Resolve P0491/P0492 for less than $2.00 in approx 15min.
How to Fix and Diagnose BMW P0491 P0492 Secondary Air / Vacuum Leak E36 E46 E39 E53
Recent hot weather, yesterday I just mention cars, from mentioning the car to open a total of twice now, each time he comes out of the heat engine billowing long time are not loose (one or two hours a ghost) we have not same situation? we may need a professional OBD2 diagnostic tool http://www.spobd2.com/wholesale/bmw-icom-a2-b-c-diagnostic-and-programming-tool.html to assistant us find out the solutions
The problem is not with the failed fan from a
broken fuse, rather it is a problem in the electric motor fan because
it is a very common problem with BMW E39, but E46 and E53! Switching the fan is completely controlled by
signals from the motor and the computer is powered pres thick wires and
securing them directly 70A fuse in the engine compartment in electrical box.
i had exactly the same problem and i solve it 3 days ago. the buttons were not responding. what you need to do is to open the front panel (not so easy job. take out the radio first and then the aircon/clima board. you will need extra care not to lose the small parts) and you will see under the buttons some metal contacts paired with some plastic joints that are not any more in the correct position: your buttons are not returning in the upper position. The small metal parts under the buttons should push back the plastic joints but yours are not doing the job anymore. Make sure that all the sides of the small metal "v" shape springs are under the plastic joints. Put everything back and should work. Before mounting everything back you can test the PCB by connecting the contacts manually. You should see the status of the leds lights changing. If the PCB is working then you will be 100% sure that the reason are the buttons.
I need also help to find the A/C electrical scheme for an bmw 1996 E39 auto climatronic. Thanks.