Mercedes Benz Forums


Go Back   Mercedes Forum - Mercedes Benz Enthusiast Forums > Mercedes Benz Models > Mercedes SL Class
Sign in using an external account
Register Forgot Password?
Search

Welcome to Mercedes Forum!
Welcome to Mercedes Forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to start new topics, reply to conversations, privately message other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join Mercedes Forum today!

Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 04-10-2006, 11:05 AM
 
Join Date: May 2005
Posts: 9
Default Climate Control Unit Faulty ?

Just over the weekend, my climate control unit (1990 300sl 24v) malfunctions. There are 5 lights permanently on and will not respond to any amount of button pushing. The little temperature read out on the top left also shows illegible characters.

Has anyone else suffered from this ?

it malfunctioned during the longest continuous trip of about 90 miles, the temperature in the cabin went up to its highest, which i am sure is fine for winter - but summer is a comin' !!!!

Is the vehicle ok to still use ?

is it as simple as a unit swap out or more indepth ?

regards

simon

1990 300SL 24v
Register today for free or log in if already registered to remove this ad!
Reply With Quote
  #2  
Old 04-11-2006, 01:50 AM
sleepwalker's Avatar
Super Moderator
 
Join Date: Apr 2004
Location: Philippine Islands
Posts: 7,045
Send a message via ICQ to sleepwalker Send a message via Yahoo to sleepwalker
Default RE: Climate Control Unit Faulty ?

it is already due to weak electronic parts inside the climate control.

resistors are know to react on temperature changes and the value differs from hot to cold.

the LCD display also reacts to heat.
__________________
support - Solar Energy
Reply With Quote
  #3  
Old 04-11-2006, 07:25 PM
 
Join Date: May 2005
Posts: 9
Default RE: Climate Control Unit Faulty ?

many thanks for the input, do you think it could be resolved by a straight swap out of unit or is the temperature in the cabin is not being regulated properly ?

I have found a local company who have agreed to check the circuit board / components, with the possibility of re-soldering all joints to eliminate dry joint failure.

will keep the forum informed.

however - if anyone else can add input - the more the merrier !!!!

many thanks to all

regards

simon

1990 300SL 24v

remember - "if you dont ask - you don't get" and

"its easier to get a pardon than permission from your partner"
Reply With Quote
  #4  
Old 04-12-2006, 07:03 PM
 
Join Date: Apr 2004
Location:
Posts: 14
Send a message via Yahoo to Rich WNY
Default RE: Climate Control Unit Faulty ?

Swap out is simple process - remove radio from console, Push Climate control unit from back and slide unit out.
There will be (2) wiring harnesses attached to top of control unit. To disconnect wire harnesses there are simple
tabs that squeeze together to attach and spread apart to disconnect. There are several places that sell re-manufactured units. Or you can buy used units from Martinito motors. I have purchased several large ticket item from them and are great to work with. you should be able to find them on ebay motors.
Rich
Reply With Quote
  #5  
Old 06-30-2006, 11:59 AM
 
Join Date: May 2005
Posts: 9
Default RE: Climate Control Unit Faulty ?

1990 300sl climate control unit 129 830 02 85

I had minor circuit board repairs done, dry joint check, but no difference, the unit is still locked, and when connected the air con fans stay on.

Without trying a new part, I am lost as to what to try next. SUGGESTIONS ????

does anyone know who might be able to supply replacement / exchange / repair unit in the UK, the previous post mentions MARTINTO, but postage cost is the same as the unit to the UK

regards

simon
Reply With Quote
Old 06-30-2006, 11:59 AM
 
 
 
Reply

Tags
04, 1990, 300sl, benz, climate, control, faulty, loked, mercedes, module, removing, repair, sl, system, unit


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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


Advertising
Featured Sponsors
Vendor Directory
Our Sponsors
GetCoolParts.com
Monroe, WA 98272
360.863.0557
All times are GMT -5. The time now is 01:29 AM.

Internet Brands, Inc.