Parts Catalog Accessories Catalog Tech Info Tech Forums
 
  Search our site:    
 Cart  | Project List | Order Status | Help    


Go Back   PeachParts Mercedes ShopForum > Technical Information and Support > Vintage Mercedes

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 02-23-2009, 12:01 AM
Registered User
 
Join Date: Feb 2009
Posts: 29
1979 W123 280E heater control

Hi,

I own an Australian 1979 280E, with non climate control air conditioning, with the temperature dials seperate for the driver and passenger. My drama is that no amount of turning the temperature knobs (cold/hot) makes any difference to the air temperature coming out of the vents, with or without the air conditioning being on, both vents just blow warm air, so obviously something to do with the control knobs not opening and or closing the necessary doors/flaps is whats wrong.

Is there a way I can find out how to fix the problem?

Thank you
Reply With Quote
  #2  
Old 02-23-2009, 09:27 PM
280EZRider's Avatar
No Dumping
 
Join Date: Jul 2007
Location: Northern CA, where the girls are warm
Posts: 1,308
The 2 temp dials are for the heater only. Warm air comes in thru the footwells and side dash vents when opened, for defrosting the side windows. Main defrost works when you select defrost with the upper-console slider and set the same 2 temp dials.

AC temp is controlled by the A/C roller wheel. This air comes in thru the 2 middle dash vents.
__________________

Don't Chrome them; polish them
Reply With Quote
  #3  
Old 02-23-2009, 09:44 PM
Registered User
 
Join Date: Feb 2009
Posts: 29
Thank you even when the ac is off there is warm air coming from the dash vents, I tried different settings with and without the ac on and there is no difference in temperature
Reply With Quote
  #4  
Old 02-24-2009, 11:34 AM
280EZRider's Avatar
No Dumping
 
Join Date: Jul 2007
Location: Northern CA, where the girls are warm
Posts: 1,308
In this case, I suggest that you check the heater shut-off valves on the firewall to to be sure they are completely off when the dials are off.
__________________

Don't Chrome them; polish them
Reply With Quote
  #5  
Old 02-24-2009, 09:20 PM
Registered User
 
Join Date: Feb 2009
Posts: 29
Thanks any idea where I can find them? Totally new to mercs
Reply With Quote
  #6  
Old 02-24-2009, 11:00 PM
280EZRider's Avatar
No Dumping
 
Join Date: Jul 2007
Location: Northern CA, where the girls are warm
Posts: 1,308
On the firewall just behind & above the right camshaft for both left & right-hand-drive cars.
__________________

Don't Chrome them; polish them

Last edited by 280EZRider; 02-25-2009 at 12:30 PM. Reason: correction
Reply With Quote
  #7  
Old 02-27-2009, 02:54 AM
Registered User
 
Join Date: Feb 2009
Posts: 29
Thanks I found it

The cables are operating the levers, but they are spinning and not actually moving the valves, plus 1 of them broke where the lever joins onto the valve D'OH

Anything I can do now?

Thank you
Reply With Quote
  #8  
Old 02-27-2009, 05:59 AM
Registered User
 
Join Date: Aug 2004
Location: Blacklick, Ohio
Posts: 226
Hello,

If I recall only the W114, W115 cars have the shut off valves on the firewall in the engine compartment. The W123 cars have them under the dash, behinc the console?

Sounds like a cable is broke or disconnected.
__________________
Joe Alexander
Blacklick, Ohio
1964 220SE Rally (La Carrera Panamericana someday)
1969 300SEL 6.3
1973 280SEL 4.5
1974 450SLC FIA Rally car (standard trans)
1982 300D turbo (winter driver)
1986 560SEC
1991 300TE (wife)
2002 SLK 32 AMG (350 hp)
Reply With Quote
  #9  
Old 02-27-2009, 02:10 PM
280EZRider's Avatar
No Dumping
 
Join Date: Jul 2007
Location: Northern CA, where the girls are warm
Posts: 1,308
Quote:
Originally Posted by hessam69 View Post
Thanks I found it

The cables are operating the levers, but they are spinning and not actually moving the valves, plus 1 of them broke where the lever joins onto the valve D'OH

Anything I can do now?

Thank you
Just replace the valve. You should be able to find one at a wrecking yard, or here on this site someone probably has a used one for sale. They are not expensive. Any valve for a manual W123 heating system will work.
__________________

Don't Chrome them; polish them
Reply With Quote
Reply

Bookmarks


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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



All times are GMT -4. The time now is 06:03 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2011 Pelican Parts - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page