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  #1  
Old 07-31-2010, 11:01 AM
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Join Date: May 2010
Posts: 10
Angry Mix of Hot/Cold Air through Vents

About a week ago the blower on my 92 190E 2.3 stop working, I had just got the air conditioning back to working. Anyway after the motor died I took it to an electrical only shop that fixed it and now I have a blower but also Hot air from the both side vents and the defroster when I have nothing turned on. If I turn the Air Conditioning on it comes through the center vents but hot air blows from both side vents and the defroster anyway.

Would this be the Climate Control Unit 'CCU' or something wrong with the flappers in the dash somewhere? This is getting frustrating, fix one thing another thing seems to break right behind it!

any help would be appreciated.

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  #2  
Old 07-31-2010, 11:23 AM
david s poole
 
Join Date: Mar 2005
Location: dallas
Posts: 1,822
somehow when they gained access to the blower they pulled the vacuum line that goes to the heater valve off this leaves it on all the time.two choices: 1 put the vac line back on or repair the break in the plastic vac line.2 buy a pair of needle nose locking pliers and crimp off one side of the heater hoses.
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David S Poole
European Performance
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"Fortune favors the prepared mind"
1987 Mercedes Benz 420SEL
1988 Mercedes Benz 300TE (With new evaporator)
2000 Mercedes Benz C280
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  #3  
Old 07-31-2010, 01:01 PM
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Quote:
Originally Posted by david s poole View Post
somehow when they gained access to the blower they pulled the vacuum line that goes to the heater valve off this leaves it on all the time.two choices: 1 put the vac line back on or repair the break in the plastic vac line.2 buy a pair of needle nose locking pliers and crimp off one side of the heater hoses.
Wow a vacuum line can cause that much trouble Thanks that is good news, come Monday Morning I will be forwarding that news.

Gracious Gracious Gracious..
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  #4  
Old 08-01-2010, 08:03 PM
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Join Date: May 2010
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Quote:
Originally Posted by david s poole View Post
somehow when they gained access to the blower they pulled the vacuum line that goes to the heater valve off this leaves it on all the time.two choices: 1 put the vac line back on or repair the break in the plastic vac line.2 buy a pair of needle nose locking pliers and crimp off one side of the heater hoses.
One big favor is there anyway you could take a picture of this valve, sorry I'm new to MB's and don't know where this one might be and I would certainly like to be able to show them what it looks like just in case they don't know.

Any help on this would be appreciated.

Thanks much.
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  #5  
Old 08-02-2010, 11:37 AM
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Join Date: Jul 2006
Location: Tampa, FL
Posts: 819
Quote:
Originally Posted by mercy485 View Post
One big favor is there anyway you could take a picture of this valve, sorry I'm new to MB's and don't know where this one might be and I would certainly like to be able to show them what it looks like just in case they don't know.

Any help on this would be appreciated.

Thanks much.
The water valve is on the passenger side under the leaf screen next to the blower housing with the red vacuum line attached. The red arrow I put in the photo is pointing to the plastic cover behind the battery that houses the OVP relay, Fuel Pump relay, etc. that I sent to another forum member.


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