sticky ventilation system?
Thread Starter
MBWorld Fanatic!
Joined: Feb 2004
Posts: 3,128
Likes: 223
From: Milton/Westport, MA USA
me: 2015 SL400 & 2015 ML400; wife: 2022 GLC Coupe; daughter: 2017 GLC SUV
sticky ventilation system?
My coupe's heat and A/C has a problem. This past winter, I couldn't get the heat to blow out of the floor vents unless I put the fan on full blast, and even then, you could hear it straining while opening and closing. My usually attentive and creative mechanic kind of rolled his eyes, like this was going to be a tough one (he hasn't attempted it yet). Now, the A/C seems to come out of the floor vents, even though I have it set for the dash. Any chance there's a DIY fix here, like spraying silicone or WD somewhere?
Super Member
Joined: Mar 2005
Posts: 648
Likes: 5
From: Houston, Texas
2017 G63 AMG, 2019 G550
I hear you. My AC blows both floor and center vents when I have it set for the center vents only. I fixed it by duck taping the floor vents. I works for now and every few months or so I replace the tape. Cheap fix for me!
Senior Member
Joined: May 2004
Posts: 482
Likes: 0
From: da rock
c240
I get the same thing. My vents on the floor are permanently open no matter what vents i choose. When my father hooked up the car to the DAS computer the climatronic or whatever its called is throwing out fault codes saying some motor is not responding. It doesn't really bother me much so I haven't spent the time or money to fix it. I think I just might try the duck tape thing.
MBWorld Fanatic!
Joined: Nov 2001
Posts: 5,854
Likes: 197
From: Huntington Beach, Ca.
'17 Jaguar XF
Sounds like you have a broken vent actuator arm or stepper motor. Common problem in early C class. Search on stepper motor for info on how to remove center console and lower dash to get at the problem.
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