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E21, E30General discussion and technical help for 1975-1991 3 series cars.
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Your Ride: 1989 325is
Heat blower question???
I have an 89 325is with 4 speed settings for the blower fan. Other than a resistor (which I swapped out and didnt work, but it was used so that one could have been bad), what else could cause the blower to only opperate at full strength? Setting 1 through 3 do not opperate. Thanks in advance for any insight.
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Your Ride: 1991 325i
Alright I had the same problem and after using checking voltages I found that it was in fact the resistor. However the physical resistors on the unit seem fine so I was wondering how the switch thing mounted at the bottom of the board worked and if it could be repaired. Maybe I'm being cheap but it doesn't seem like anything else is broken and I already cleaned all the contacts and whatnot so that's the only questionable part left.
EDIT: In general if number four works that means you have full voltage to your blower motor. The resistors are on a separate circuit which generally means a bad resistor. If say 1 or 2 out of the 4 work then it would more likely be the switch.
11-10-2007, 08:14 PM
1989 325is ///
I keep forgetting that - I have a great memory but it doesn't last long
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