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#1
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1980 240D Cabin Blower speed switch cable
Anyone out there know what the bowden cable attached to the cabin blower switch operates....Its the type with the little white plastic balls attached to each other with some type string or wire.... I am guessing it moves an air flap somewhere.....An air distribution diagram would be great....manual climate control....
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#2
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bump
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'82 240D, 215,000 + Classic White, Regenbogen |
#3
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I have been told that it opperates some sort of AC flap. I'm not sure what it does in my car which has no factory AC. I had a thread going on this topic a while back.
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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver 1982 300SD - 232K miles - Wife's Daily Driver 1986 560SL - Wife's red speed machine |
#4
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If you are referring to the cable that runs from the central one of the three rotary switches (fan speed) then it attaches to the evap box by a circuitous route to the left of the centre console, behind the heater box (between the heater box and the firewall just above the tranny tunnel) and then over to the passenger side of the car where it connects to the front of the evap box directly behind the glove box. It appears to operate some sort of flap inside the evap box. But I have no idea exactly what this is supposed to do as when I was troubleshooting mine it made no apparent difference to air flow at all. However as my AC compressor is seized I couldnt tell you if it works in conjunction with AC only or not. There have been several threads on this topic from DMorrison who did a lot of AC work on his cars and on my car as I'm currently wrestling with the whole mess in mine.
- Peter.
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2021 Chevrolet Spark Formerly... 2000 GMC Sonoma 1981 240D 4spd stick. 347000 miles. Deceased Feb 14 2021 2002 Kia Rio. Worst crap on four wheels 1981 240D 4spd stick. 389000 miles. 1984 123 200 1979 116 280S 1972 Cadillac Sedan DeVille 1971 108 280S |
#5
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Would like to know this as well, going to be (trying) to fix AC system soon.
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'79 240D 4 speed manual 105k miles |
#6
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Maybe it's one of those luxury items, reducing the blower fan noise.
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All I can tell you is that replacing that switch was an egly job and I hope I never have too do it again
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1985 Euro 240D 5 spd 140K 1979 240D 5 spd, 40K on engine rebuild 1994 Dodge/Cummins, 5 spd, 121K 1964 Allice Chalmers D15 tractor 2014 Kubota L3800 tractor 1964 VW bug "Lifes too short to drive a boring car" |
#8
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Some may be familar with older style climate control systems where the positive pressure or "ram air affect" can be used at higher speeds to circulate air through the cabin instead of using the fan. I was told that moving the knob between "off" and the first line allowed the driver to adjust the quantity of airflow under these conditions. Sounds like the cable works a flap to control the airflow somewhere in the box. I was never able to verify that though. If I am correct, the adjustment would be most noticable at highway speeds while adjusting the knob.
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1976 BMW 2002- 100k 1995 BMW 325i 175k 1984 Mercedes Benz 300D Turbo Diesel- 270,000 mi 1981 Mercedes Benz 240D- Estimated 300,000+ mi Returned to the earth |
#9
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Quote:
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a few mb diesels |
#10
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I agree. With the knob in the off position, you can still get airflow from the vents. A bad seal on the flaps will do that.
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1976 BMW 2002- 100k 1995 BMW 325i 175k 1984 Mercedes Benz 300D Turbo Diesel- 270,000 mi 1981 Mercedes Benz 240D- Estimated 300,000+ mi Returned to the earth |
#11
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Quote:
- Peter.
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2021 Chevrolet Spark Formerly... 2000 GMC Sonoma 1981 240D 4spd stick. 347000 miles. Deceased Feb 14 2021 2002 Kia Rio. Worst crap on four wheels 1981 240D 4spd stick. 389000 miles. 1984 123 200 1979 116 280S 1972 Cadillac Sedan DeVille 1971 108 280S |
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