'72 220D AC Troubles - Mercedes-Benz Forum

LinkBack Thread Tools Display Modes
post #1 of 4 (permalink) Old 06-21-2011, 01:26 PM Thread Starter
BenzWorld Junior Member
b3lrod's Avatar
Date registered: Dec 2010
Posts: 8
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
(Thread Starter)
'72 220D AC Troubles

I have a 1972 220d, and can't seem to fix the AC. As far as I could tell, the only problem was that the fans were worn out. After poking around inside my dashboard with some electrical meters, I discovered that the fans weren't getting any power. All my fuses and such are intact, and I've no clue what to do, now. The only clues towards the problem I've found were two blue wires that weren't connected to anything on one end. There was also a 10" length of brown wire, with connectors on both ends- but it wasn't attached to anything.

Does anyone have any ideas for fixing this?
b3lrod is offline  
Sponsored Links
post #2 of 4 (permalink) Old 06-21-2011, 04:02 PM
BenzWorld Elite
79Mercy's Avatar
Date registered: Oct 2006
Vehicle: 1979 280CE
Location: Jacksonville, Florida
Posts: 6,116
Mentioned: 0 Post(s)
Quoted: 2 Post(s)
There is a vacuum actuator under the dash on the drivers side just above the accelerator pedal. That actuator rod should go up when the green AC knob on the console is turned clockwise. Then turn the defroster switch to one of the 3 speeds, fan should come on.

Most people have vacuum leaks. Push that actuator rod up with the your hand and see if the fan comes on.

'79 280CE with 226,000 miles
'76 240D 4 speed with 190,000
'85 300D Turbo with 266,000 miles

GONE but not forgotten
'76 300D with 195,300 miles
"83 300D with 174,000 miles

79Mercy is offline  
post #3 of 4 (permalink) Old 06-21-2011, 07:01 PM
BenzWorld Member
Date registered: Feb 2011
Vehicle: 1973 220D
Location: California
Posts: 295
Mentioned: 0 Post(s)
Quoted: 1 Post(s)
Exactly it's a different fan from the defroster but the same switch.

Good luck

Frank Flynn. Poet, Artist & Mystic
frankflynn is offline  
post #4 of 4 (permalink) Old 06-22-2011, 01:37 PM Thread Starter
BenzWorld Junior Member
b3lrod's Avatar
Date registered: Dec 2010
Posts: 8
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
(Thread Starter)
I checked under the dash, and found the rod you guys were talking about... It started in the up position, and went down when I turned the green knob. I couldn't move it by hand without turning the knob in either direction, and the fans still didn't come on.
Is there anything that might be preventing them from getting power? The fuses are all intact, and there aren't any wires missing from the back of the housing.
b3lrod is offline  
Sponsored Links

  Mercedes-Benz Forum > General Mercedes-Benz Forums > Vintage Mercedes-Benz

Quick Reply

Register Now

In order to be able to post messages on the Mercedes-Benz Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


  • Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
    Thread Tools
    Show Printable Version Show Printable Version
    Email this Page Email this Page
    Display Modes
    Linear Mode Linear Mode

    Similar Threads
    Topic Author Forum Replies Last Post
    What is a 220D Bar 8 engnenk Vintage Mercedes-Benz 7 09-21-2010 12:09 PM
    tdc 69 220D tdc General Mercedes-Benz 1 08-29-2009 03:27 PM
    220D??? cooljjay W123 E,CE,D,CD,TD,TE Class 11 12-09-2008 03:36 PM
    220D Help screwjackfoo Vintage Mercedes-Benz 2 11-16-2005 04:02 PM
    220d chow Vintage Mercedes-Benz 0 06-20-2004 08:13 AM

    Posting Rules  
    You may post new threads
    You may post replies
    You may not post attachments
    You may not edit your posts

    BB code is On
    Smilies are On
    [IMG] code is On
    HTML code is Off
    Trackbacks are On
    Pingbacks are On
    Refbacks are On


    Title goes here

    video goes here
    description goes here. Read Full Story
    For the best viewing experience please update your browser to Google Chrome