Heating issue
Thread Starter
MBWorld Fanatic!
Joined: Jul 2006
Posts: 2,147
Likes: 2
From: Central Florida
R129, XF Sportbrake, SC400
Heating issue
So i had to put on the heat in the car today for the first time in a long long time. I set it to 78 degrees and pressed the auto button. The two center vents blue cold air while the one on the end, all the way to the left of the car, blew warm air. I thought that eventually the middle vents would blow warm air but they stayed pretty cold. Any ideas what the problem could be? Or am i just not doing something right?
MBWorld Fanatic!
Joined: Jan 2005
Posts: 2,848
Likes: 15
From: Orange County
2005 C Wagon (No snickering please!)
Hey Ryan,
You might have broken linkage on the stepper motors that move the air control flaps in the dash. The part is cheap, but it takes all darn day to take the dash apart to fix it.
Heaters in FL often die of boredom, and lack of use with high summer heat contributes to the broken linkages.
I don't think you are doing anything wrong. You might try pushing the recirculate button to see if the outside air door will close. This might allow the center vent to warm up a bit. When you hit the windshield defrost button, do the dash vents close and the window vents open and blow dragon breath on the inside the glass?
You might have broken linkage on the stepper motors that move the air control flaps in the dash. The part is cheap, but it takes all darn day to take the dash apart to fix it.
Heaters in FL often die of boredom, and lack of use with high summer heat contributes to the broken linkages.
I don't think you are doing anything wrong. You might try pushing the recirculate button to see if the outside air door will close. This might allow the center vent to warm up a bit. When you hit the windshield defrost button, do the dash vents close and the window vents open and blow dragon breath on the inside the glass?
Thread Starter
MBWorld Fanatic!
Joined: Jul 2006
Posts: 2,147
Likes: 2
From: Central Florida
R129, XF Sportbrake, SC400
Hey Ryan,
You might have broken linkage on the stepper motors that move the air control flaps in the dash. The part is cheap, but it takes all darn day to take the dash apart to fix it.
Heaters in FL often die of boredom, and lack of use with high summer heat contributes to the broken linkages.
I don't think you are doing anything wrong. You might try pushing the recirculate button to see if the outside air door will close. This might allow the center vent to warm up a bit. When you hit the windshield defrost button, do the dash vents close and the window vents open and blow dragon breath on the inside the glass?
You might have broken linkage on the stepper motors that move the air control flaps in the dash. The part is cheap, but it takes all darn day to take the dash apart to fix it.
Heaters in FL often die of boredom, and lack of use with high summer heat contributes to the broken linkages.
I don't think you are doing anything wrong. You might try pushing the recirculate button to see if the outside air door will close. This might allow the center vent to warm up a bit. When you hit the windshield defrost button, do the dash vents close and the window vents open and blow dragon breath on the inside the glass?
MBWorld Fanatic!
Joined: Nov 2001
Posts: 6,211
Likes: 2
From: Laguna Niguel, CA
Yes, back in 2002 they had that crazy vent thing on top of the dash that lets cold air in and also a wheel in between the vents that did a similar thing. It's hard for the rest of us to visualize because they did away with part of it in 2003 and all of it in 2004.
Thread Starter
MBWorld Fanatic!
Joined: Jul 2006
Posts: 2,147
Likes: 2
From: Central Florida
R129, XF Sportbrake, SC400
Hmm, that may have something to do that. I thought the wheel on the vent on top of the dash was just to open or close it. I didn't know it also let in cold air. I will definately try the wheel with the blue on it though.
