Question about 1990 Mercedes-Benz 300 Diesel
You will need to replace the blend door acuator, the little motor gear that turns the vent door is broken or stuck and that is why you have heat only coming out of the defroster
Posted on Oct 03, 2010
The heat in your car is generated by a heater; that heater runs with the coolant from the engine; to control the temperature on the pipe coming from the engine to the heater there's a valve.
In your case that valve is stuck open, probably because it was seized by deposits. All you have to do is to replace that valve. The same valve is used in all W126 models so you can find a replacement one very cheaply at a breakers yard.
The fan problem is electric so you must check all the connections, starting at the fan motor
Posted on Oct 02, 2010
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Sep 07, 2017 | Chevrolet Cars & Trucks
Aug 26, 2011 | 2002 Ford Taurus
Mar 28, 2011 | 1993 Oldsmobile Bravada
Nov 27, 2010 | 1987 Ford Taurus
Apr 03, 2009 | 1992 Mazda MX-5
Feb 15, 2009 | 1990 Ford Bronco
Feb 15, 2009 | 2004 Saturn VUE
Nov 17, 2008 | 1990 Chevrolet Lumina APV
70 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: