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#1
10-17-2005, 09:26 PM
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foot flaps not working with heat?
For the 300D. I've been noticing on these colder mornings that I can't get the foot well flaps to open with heat. They work fine with the A/C on but not heat so I know the pod is good. Where should I look for the cause of this problem.
__________________
Adam Lumsden (83) 300D Vice-President of the MBCA International Stars Section 
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#2
10-17-2005, 10:23 PM
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There's a switchover valve behind the climate control buttons. I don't know if the valve is operated differently on heat than on AC but it's a possibility. It's pretty easy to put the Mity vac on the line to the pod and see if you are getting any vacuum at all when heat is activated.
__________________
1977 300d 70k--sold 08 1985 300TD 185k+ 1984 307d 126k--sold 8/03 1985 409d 65k--sold 06 1984 300SD 315k--daughter's car 1979 300SD 122k--sold 2/11 1999 Fuso FG Expedition Camper 1993 GMC Sierra 6.5 TD 4x4 1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
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#3
10-18-2005, 07:33 AM
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Confused by your statement that your foot well flaps work fine with A/C. My understanding is that there should be no air flow into the passenger footwell compartments with either A/C or unheated air. Only heated air should be coming out those vents.
r/ Dave
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#4
10-18-2005, 09:57 AM
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By the way, the foot flaps should also be closed if you push the far left button for high defrost.
__________________
1977 300d 70k--sold 08 1985 300TD 185k+ 1984 307d 126k--sold 8/03 1985 409d 65k--sold 06 1984 300SD 315k--daughter's car 1979 300SD 122k--sold 2/11 1999 Fuso FG Expedition Camper 1993 GMC Sierra 6.5 TD 4x4 1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
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#5
10-18-2005, 10:55 AM
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They are closed with defrost. Open with the two white arrows and closed with the upper black, lower white arrow buttens when in cooling mode.
__________________
Adam Lumsden (83) 300D Vice-President of the MBCA International Stars Section
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#6
10-18-2005, 11:05 AM
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Yup. After a year of thinking mine were broken, I tried the double-white arrow button a few weeks ago and heat came out of the footwells!
The manual seems to be a bit unclear about this. I'm pretty sure only heat or non-cooled air should come out of the footwell vents.
__________________
========================== Aaron '84 300D 267,000 - Running WVO - Rice Bran Oil - Mmmmmm, fishy... ==========================
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#7
10-22-2005, 05:19 PM
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Quote:
__________________
Adam Lumsden (83) 300D Vice-President of the MBCA International Stars Section
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#8
10-22-2005, 08:53 PM
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I love Mercedes
I tore apart everything in the dash and tested every vac valve and checked the electric solonoids for function as well as the right signal. I found a dead fresh/recirc valve (line caped for now) and thats all. For some reason unknown to me the foot flaps started to work properly. Also I found that the defroster is always on but the 2 stage valve holds vac fine on both stages. It's connected to the center vent somehow but those work fine. Right now with the A/C season over I'm calling it fixed (minus the fresh/recirc valve which I'll order a diaphram for).
Now on to the door lock system!
__________________
Adam Lumsden (83) 300D Vice-President of the MBCA International Stars Section
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