e34 540I heater only works on full speed!!! - BMW Forum - BimmerWerkz.com
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#1 (permalink) Old 10-14-2008, 11:18 AM
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e34 540I heater only works on full speed!!!

hi i have an 1994 e34 540I, initally my fan ran on after the engine had stopped and flattened my battery then i messed around with bits and pieces namely what i believe in the final stage resistor down in the passenger footwell then it stopped running on and now only works on speed 4 (the fastst) ive tried changing the control unit on the dash (for a 2nd hand admittedly) and the final stage i fitted was also second hand but i would think there is a problem somewhere else as i doubt the problem would be identical

ANY HELP????????
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#2 (permalink) Old 10-14-2008, 11:32 AM
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Souds like your heater valves need cleaning or replacing.

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#3 (permalink) Old 10-15-2008, 10:38 AM
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thanks for reply mate but im quite sure its an electrical problem im bit stumped now lol
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