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E28 (1982 - 1988)

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  #1  
Old 07-10-2008, 02:52 PM
Hillhippy Hillhippy is offline
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Location: Northeast Tennessee
 
Join Date: Dec 2007
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Mein Auto: 1987 BMW 535i
Guess whats blowing my fuse?

87 535is, The 25A "heater blower/AC" fuse is blowing. What would be the top suspect? The blower resistor, the blower motor itself? Is this a known issue? One strange thing to me, is the fuse is not blowing until heating up enough to melt the plastic under the fuses. Help a newb
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  #2  
Old 07-10-2008, 03:06 PM
awilliams684 awilliams684 is offline
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Location: Rochester NY/Baghdad Iraq
 
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Mein Auto: 97 540i
i know that on our trucks over here in iraq we get that problem a lot. The blower motor accumulates so much dust dust and gets weighed down to the point it melts the resistor pack. They run a 40 amp fuse so it doesnt usually blow but that extra weight puts a lot of strain on the system.
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  #3  
Old 07-10-2008, 09:30 PM
Hillhippy Hillhippy is offline
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Location: Northeast Tennessee
 
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Mein Auto: 1987 BMW 535i
Hey, thanks for taking time to answer. Watch your 6 over there!
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  #4  
Old 07-11-2008, 07:59 AM
jimoreno jimoreno is offline
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Location: Parsippany, NJ
 
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Mein Auto: 2006 X3
First thing to do is clean the fuse tabs and use a new fuse. If your fuse box is melting, you might need to open it up and see if the bottom connection needs to be cleaned. Melting fise boxes are not that uncommon on our cars since they use the old type fuses. I found this guy was having the same problem that you are having (and this other one).

Good Luck!
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1986 535i
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  #5  
Old 07-11-2008, 02:13 PM
Hillhippy Hillhippy is offline
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Location: Northeast Tennessee
 
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Mein Auto: 1987 BMW 535i
Thanks for the links! That gives me a couple of good ideas to start with.
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