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 > Tech Help

LinkBack Thread Tools Display Modes
Old 11-19-2001, 09:54 PM
Posts: n/a
climate control 1987 300D

I have a 1987 300D that will not deliver heat unless I turn the temp wheel as far as it will go. It takes a few minutes to start but after I do that it will finally blow heat. If I turn the temp. wheel at all to a lower temperature after the heater starts it will quit blowing warm air and start the air conditioning. I have replaced all of the air conditioning and some of the heating system including the push button control unit. Any suggestions would be very helpful.
Reply With Quote
Old 11-19-2001, 11:24 PM
Senior Member
Join Date: Apr 2001
Location: Beech Island, S.C.
Posts: 468
My first advise is to check the coolant level.
Reply With Quote
Old 11-20-2001, 12:38 AM
Registered User
Join Date: Nov 2000
Location: Manchester, United Kingdom
Posts: 42
Yes, I also suggest to check the coolent level. Then check the heater valve, if it not open then hot coolent cannot enter to the heater. You can chect it but unplug the wiring and give it 12 volt power, and see wheather it work or not.

If not it's problem, check the potential meter of your temperature control, as mind have problem few days ago, you can try to clean it, and see wheather it better or not.

If not as well, try to test the temperature sensor.

If your test everything and can't find anything go wrong, then, might be the ECU causing problem.
Reply With Quote
Old 11-20-2001, 09:13 AM
Posts: n/a
You are getting some good replies here, but don't forget to see that the heater core is clear. To do that, you can simply disconnect the hoses at the firewall that go to and from the heater core and blow through them to see that it will flow.

Good luck,
Reply With Quote


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

Similar Threads
Thread Thread Starter Forum Replies Last Post
87 300D No heat. Are Climate Control dampers driven by onboard electric vacuum pump? Carrameow Diesel Discussion 3 08-24-2004 01:42 AM
Replacing aux. pump and climate control unit...more? danalinscott Diesel Discussion 1 10-13-2003 02:17 PM
climate control for 1987 mercedes benz 190e 2.6 Carl Parks Tech Help 0 09-13-2003 03:13 PM
Climate Control, '81 300D LarryBible Tech Help 10 10-31-2001 04:40 PM
1984 300D climate control problems Nate Corey Diesel Discussion 1 09-03-2001 01:26 AM

All times are GMT -4. The time now is 09:57 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2016, 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