Hey guys having trouble sorting this out.
This car have been off the road for some time
and the hvac needs some work. The blower only works
when I spin the thumb wheel all the way to high.
Is doaent blow at all with the defroster button pressed.
I have read about the miniature switch on the thumb wheel and have
ordered one but I checked it with a meter and it
seems to work. I see there are two resistor/transistor
mounted on the blower housing. I am wondering if this is the issue ?
They are a bit costly at $150 each. I can’t find any info about these
for the E23 cars.
You need new blower transistors. Maybe $6 from Mouser.com and a few hours to R&R the blower parts, then desolder, and resolder the new.
I make E23 parts.
09/1983 745i (stolen spring '13 around Houston, TX Achatgruen on nutria buffalo. 8481080)
10/1984 745i
11/1984 745i
11/1984 735i (10:1-265/6)
Ford, MB, and GM round out the pack.
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