190 a/c stuck on?

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190 a/c stuck on?

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Mercedes Forums >> Mercedes Benz Models >> Diesel Discussions >> 190 a/c stuck on?

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190 a/c stuck on? - 1/22/2007 2:42:23 PM

AMGMercedes

Posts: 1556
Joined: 1/31/2006
From: Maryland
Status: offline

So it's still obviously winter and my heat is on in the car. Problem is, whether I have the a/c or heat on, the center vent is always blowing really cold air. Even with the vent closed, it's still creates a noticable draft. Is this supposed to happen? How do I fix this so it also blows warm air like the drivers side vent?

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1984 Mercedes 190D-SOLD!
1999 Honda Civic DX- Current DD
1986 Mercedes 190E-16v-On the way

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RE: 190 a/c stuck on? - 1/22/2007 2:50:44 PM

mbz300sdl

Posts: 2467
Joined: 10/26/2004
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I was told it was some kind of vacuum thing when my car did it. Not real sure on that one cant u close off the center vent in a W201? Like u can in a W126?

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(in reply to AMGMercedes)

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RE: 190 a/c stuck on? - 1/22/2007 9:37:47 PM

carnut

Posts: 157
Joined: 3/31/2006
Status: offline

Heat should never come from the center vents, only cool. With that said and assuming you have the system in the auto mode, warm air should be directed to the floor mainly, a slight amount to the two outer vents and an even slighter amount to the defrosters. My thought is you have a center vent vacuum problem. Do you have an owners manual? The climate system was problematic in that era of 190's both gas and diesel.

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1981 300CD. had a 72 280SEL 4.5, had a 66 250S

(in reply to mbz300sdl)

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RE: 190 a/c stuck on? - 1/22/2007 11:11:40 PM

AMGMercedes

Posts: 1556
Joined: 1/31/2006
From: Maryland
Status: offline

quote:

cant u close off the center vent

Yeah, but when I make a turn, I feel cold drafts. Plus it stops like 70% and there's still a lot comming out.

The manual is in my possesion. So if it were a vacuum problem and I had the heat on, would it stop the cold air with the center vent still open? Or does the vacuum work only when the vent is closed? How hard is replacing one of these?

_____________________________

1984 Mercedes 190D-SOLD!
1999 Honda Civic DX- Current DD
1986 Mercedes 190E-16v-On the way

(in reply to carnut)

Post #: 4