heat not working in my mercedes

2000 MERCEDES BENZ ML430
213 MILES
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DARRON514
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  • 1 POST
The heat in my Mercedes ML430 is not working the fans are blowing, but cold air is coming out. going to work I tried it several times as I was driving thanking that the car had not heated up it self. I drive bout 40 miles to work and the Mercedes heater never worked
Oct 28, 2013 at 3:15 PM
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TY ANDERSON
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  • 719 POSTS
There is only a few things that can cause this. First, when the engine has warmed up check the heater hoses (there is only 2 hoses) to make sure they feel the same (temperature both hot). Next, there is a door inside the air condition ducting behind the dash that allows heated air or cooled air to blowing out of dash vents. There is a small motor that controls this door's opening and closing. The issues here could be the motor itself, a broke door or the control module that controls this motor.
Let me know what you find or if you have more questions about what I've said.
Oct 28, 2013 at 8:14 PM