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#1
08-27-2010, 07:21 PM
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climate controll blower 25A fuse blows
85 300SD keeps blowing 25A fuse when blower is on high setting or in auto when it calls for a high setting. ac and heat works ok on low setting,fuse dont blow on low blower setting. It is a friends car I am trying to help out.
I suspect the motor,but there may be other components. thanx John 
__________________
88 W124 3.0 96 R129 119eng 06 ML350 98 ML320 sold 02 CLK55 amg 
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#2
08-27-2010, 08:52 PM
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That does sound like the motor is drawing a bit more power than it should.
It's not that difficult to drop the motor out and see if there is anything in the fan, blow out the motor with a compressor, and drop a little bit of ATF on the bushings in the motor.
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-Josh Testing the cheap Mercedes axiom, one bolt at a time...
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#3
08-28-2010, 01:40 AM
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Here is your answer (you can thank me later):
617 melts fuse 11 in 1985 300SD... what's the scoop? 1985 300SD 617 Aux Fan & A/C Thoughts + Help Needed
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I'm not a doctor, but I'll have a look.  '85 300SD 245k '87 300SDL 251k '90 300SEL 326k Six others from BMW, GM, and Ford. Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]
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#4
08-30-2010, 09:16 PM
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mine has doing the same thing. I've known for awhile. I don't like the fact that these blowers give out. its annoying. and I'm going to keep buying fuses dag nabit.
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 77' 300D, "Cartman" SOLD @ 150K (didn't know what I had)  83' 300SD, "The Superdon" 325k+ @ 28mpg 95 E320 wagon, "Millennium Falcon" 231k+ @ 24 Mpg 95 E300D, "Sherley" 308k @ 33.69 Mpg, currently anticipating a head  99 Suzuki Intruder "Trudy" @ 45 mpg
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#5
08-30-2010, 11:39 PM
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Quote:
Why? Just buy the fix I linked everyone to and get on with life.
__________________
I'm not a doctor, but I'll have a look. '85 300SD 245k '87 300SDL 251k '90 300SEL 326k Six others from BMW, GM, and Ford. Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]
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#6
08-31-2010, 12:20 AM
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This has been an issue with all 80's and early 90's blowers. For the 124's they had a service bulletin to move to an outside the fusebox strip fuse which they mounted on the drivers side strut tower. It was like a silent recall. If you fuse blew they put it in. In 93 on most it was just standard. Its like a 40 dollars kit from MB for 124's, may be a direct fit for others.
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#7
08-31-2010, 12:03 PM
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it's really simple,they had a 25amp fuse protecting the circuit and the blower motor draws at least 30amps at 95f.the replace kit was a 30amp slower blow fuse.
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David S Poole European Performance Dallas, TX 4696880422 "Fortune favors the prepared mind" 1987 Mercedes Benz 420SEL 1988 Mercedes Benz 300TE (With new evaporator) 2000 Mercedes Benz C280 http://www.w108.org/gallery/albums/A...1159.thumb.jpg
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#8
08-31-2010, 04:48 PM
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Quote:
My '90 has it as does my '87, so I am going to go out on a limb it started around '86. But I have since gotten rid of that 420sel (foolishly) so no idea there. BUT, my '85 did not have this installed. Anyway, I posted two links both with the fix. Read them, fix it, life is good.
__________________
I'm not a doctor, but I'll have a look. '85 300SD 245k '87 300SDL 251k '90 300SEL 326k Six others from BMW, GM, and Ford. Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]
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