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#1
12-21-2004, 03:12 PM
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w126 heater vent intermitent by feet
My 1990 350 SDL does not consistently blow hot air from the vents in the footwell. It blows fine through defroster and dash vents but not at footwell. It seems to have no predictable pattern. Heater blows hot and all other controls work fine including AC. I've tried to search the forum so as to not waste anyones time if this issue has been reviewed priviously. Any help?
Thanks, Adnre 
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#2
12-21-2004, 09:02 PM
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300se
My 300se does the same thing......
It seems to mix the cool vent air and hot air?? Seems like the defroster is always on even with the A/C?? And help would be appreciated ... -Anthony 1990 300se 1991 350sd 1972 280se 4.5 1967 250/280 se/c euro
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#3
12-21-2004, 10:41 PM
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Defrost is the default. You have most likely a leaky vacuum pod. The one that controls the flow to the footwell. I have the same problem and will be tackling it soon.
__________________
Michael LaFleur '05 E320 CDI - 86,000 miles '86 300SDL - 360,000 miles '85 300SD - 150,000 miles (sold) '89 190D - 120,000 miles (sold) '85 300SD - 317,000 miles (sold) '98 ML320 - 270,000 miles (sold) '75 300D - 170,000 miles (sold) '83 Harley Davidson FLTC (Broken again) :-( '61 Plymouth Valiant - 60k mikes 2004 Papillon (Oliver) 2005 Tzitzu (Griffon) 2009 Welsh Corgi (Buba) 
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#4
12-21-2004, 11:09 PM
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With the middle button in the PBCU pushed in, are you supposed to get hot air from the footwell as well as the two dash vents (leftmost and rightmost)? I've never had any hot air from in my footwells. How does one go about tackling this one?
__________________
1999 Mercedes-Benz S600, 103K miles - garage queen 1988 Mercedes-Benz 560SEL, 89K miles - daily driver 2007 Hyundai Sonata Limited, 31K - daily driver
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#5
12-22-2004, 12:38 AM
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The only time you are not supposed to get some flow from the footwell is in DEFROST and OFF.
__________________
Michael LaFleur '05 E320 CDI - 86,000 miles '86 300SDL - 360,000 miles '85 300SD - 150,000 miles (sold) '89 190D - 120,000 miles (sold) '85 300SD - 317,000 miles (sold) '98 ML320 - 270,000 miles (sold) '75 300D - 170,000 miles (sold) '83 Harley Davidson FLTC (Broken again) :-( '61 Plymouth Valiant - 60k mikes 2004 Papillon (Oliver) 2005 Tzitzu (Griffon) 2009 Welsh Corgi (Buba)
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#6
12-22-2004, 01:09 AM
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I guess I have work to do then don't I? Anyone wish to tell me where to start?
__________________
1999 Mercedes-Benz S600, 103K miles - garage queen 1988 Mercedes-Benz 560SEL, 89K miles - daily driver 2007 Hyundai Sonata Limited, 31K - daily driver
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