Heating Vents

dlbehrns · 01-19-2012, 04:05 PM

I can't get my heating vents to direct warm air to my feeties. It was 7 degrees when I left for work this a.m.

Where do I start?

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dlbehrns · 01-20-2012, 09:18 AM

Anybody?

slobodan · 01-20-2012, 08:46 PM

I would check the vacuum line that is located on top of the throttle body in the center it is white in color. Mine came loose and my top center vents would not work. Don't know if that controls the bottom but worth a quick look. I would imagine that it was a vacuum line of some sort. Hope this helps.

dlbehrns · 01-21-2012, 11:52 AM

thank you slo. forgive my ignorance but exactly where is the TB located. Never had to deal with it b-4 so I don't know what I am looking at. No luck w/Search. TIA, dlb

OGCLK320 · 01-21-2012, 01:28 PM

My 98 has not been able to direct air towards the feet for years, I dont live any where too cold, so not a big deal for me, hopefully someone can chime in and give us a quick fix!

Mslaughter · 01-22-2012, 12:48 AM

Quote:

Originally Posted by dlbehrns

thank you slo. forgive my ignorance but exactly where is the TB located. Never had to deal with it b-4 so I don't know what I am looking at. No luck w/Search. TIA, dlb

I'm not familiar with the vacuum line, but your throttle body is at the rear on the engine, connected to the intake manifold. Just trace your intake tube back and you should find it.

It'll be around 4.

slobodan · 01-22-2012, 04:16 PM

The vacuum line is the white line at the top of the motor and is located center of the picture. it's right under the windshield wiper motor. it looks like a white coffe straw

dlbehrns · 01-22-2012, 05:42 PM

Well I found the throttle body and there is a U shaped rubber hose on it not more than a couple inches long that attaches adjacent to the TB but no other white lines that I could see or feel. I'm curious to know what vaccum line feeds the vent door system and from where on a 99 V6. With a warm day today I left the car run to find that the radiator fan was running even when the car was cold. Once the car warmed up the fan didn't turn off so I unplugged it. Then I checked the vents again and I was getting air to the floor vents. Let the car cool off, start the car and plug the fan back in and it doesn't turn and air stil coming from the floor vents. Its still a mystery as to why the problem occurred in the first place. Thanks to all for your suggestions.

slobodan · 01-23-2012, 01:50 PM

Glad it's working again. Just a thought though, have you checked the coolant level? I know in some vehicles when the coolant is low it doesn’t always make it to the heater core and can cause issues. Here is a better pic of the line I was talking about. It can get knocked loose when you remove the cover.

dlbehrns · 01-23-2012, 02:50 PM

Hey slo, I was looking at the left/passenger back side of the engine by the firewall. Is that not the TB?

slobodan · 01-23-2012, 03:14 PM

Its located center rear of the motor. Just follow you air intake and it will lead you to it.

01-20-2012, 09:18 AM	#2
dlbehrns MBWorld Fanatic! Garage is empty, add now Join Date: May 2007 Location: Nebraska Posts: 1,009 Drives: 99CLK320,	Anybody? __________________ 99CLK320-One day I woke up and my slab had morphed into a McLaren MP4-12C INMotionusa Chip Tune, Sprintbooster, VIPclk320's cold air ram intake and front & rear strut bars, Ghostrider's short tube headers and rear camber kit, MB front control arm camber bolts, Vogtland Springs, Bilstein Sport shocks, Goodridge stainless braided brake lines. Wish list: SuperSprint resonator and muffler, seconary cats deleted.

01-21-2012, 11:52 AM	#4
dlbehrns MBWorld Fanatic! Garage is empty, add now Join Date: May 2007 Location: Nebraska Posts: 1,009 Drives: 99CLK320,	thank you slo. forgive my ignorance but exactly where is the TB located. Never had to deal with it b-4 so I don't know what I am looking at. No luck w/Search. TIA, dlb __________________ 99CLK320-One day I woke up and my slab had morphed into a McLaren MP4-12C INMotionusa Chip Tune, Sprintbooster, VIPclk320's cold air ram intake and front & rear strut bars, Ghostrider's short tube headers and rear camber kit, MB front control arm camber bolts, Vogtland Springs, Bilstein Sport shocks, Goodridge stainless braided brake lines. Wish list: SuperSprint resonator and muffler, seconary cats deleted.

01-21-2012, 01:28 PM	#5
OGCLK320 Senior Member Garage is empty, add now Join Date: Dec 2008 Location: San Diego Posts: 287 Drives: 98 CLK 320	My 98 has not been able to direct air towards the feet for years, I dont live any where too cold, so not a big deal for me, hopefully someone can chime in and give us a quick fix! __________________ OGCLK320

01-22-2012, 04:16 PM	#7
slobodan Member Garage is empty, add now Join Date: Feb 2011 Location: Louisville, Ky Posts: 83 Drives: 1999 CLK 320	The vacuum line is the white line at the top of the motor and is located center of the picture. it's right under the windshield wiper motor. it looks like a white coffe straw Attached Thumbnails

01-22-2012, 05:42 PM	#8
dlbehrns MBWorld Fanatic! Garage is empty, add now Join Date: May 2007 Location: Nebraska Posts: 1,009 Drives: 99CLK320,	Well I found the throttle body and there is a U shaped rubber hose on it not more than a couple inches long that attaches adjacent to the TB but no other white lines that I could see or feel. I'm curious to know what vaccum line feeds the vent door system and from where on a 99 V6. With a warm day today I left the car run to find that the radiator fan was running even when the car was cold. Once the car warmed up the fan didn't turn off so I unplugged it. Then I checked the vents again and I was getting air to the floor vents. Let the car cool off, start the car and plug the fan back in and it doesn't turn and air stil coming from the floor vents. Its still a mystery as to why the problem occurred in the first place. Thanks to all for your suggestions. __________________ 99CLK320-One day I woke up and my slab had morphed into a McLaren MP4-12C INMotionusa Chip Tune, Sprintbooster, VIPclk320's cold air ram intake and front & rear strut bars, Ghostrider's short tube headers and rear camber kit, MB front control arm camber bolts, Vogtland Springs, Bilstein Sport shocks, Goodridge stainless braided brake lines. Wish list: SuperSprint resonator and muffler, seconary cats deleted. Last edited by dlbehrns; 01-22-2012 at 05:44 PM.

01-20-2012, 08:46 PM	#3
slobodan Member Garage is empty, add now Join Date: Feb 2011 Location: Louisville, Ky Posts: 83 Drives: 1999 CLK 320	I would check the vacuum line that is located on top of the throttle body in the center it is white in color. Mine came loose and my top center vents would not work. Don't know if that controls the bottom but worth a quick look. I would imagine that it was a vacuum line of some sort. Hope this helps.

01-23-2012, 01:50 PM	#9
slobodan Member Garage is empty, add now Join Date: Feb 2011 Location: Louisville, Ky Posts: 83 Drives: 1999 CLK 320	Glad it's working again. Just a thought though, have you checked the coolant level? I know in some vehicles when the coolant is low it doesn’t always make it to the heater core and can cause issues. Here is a better pic of the line I was talking about. It can get knocked loose when you remove the cover. Attached Thumbnails Last edited by slobodan; 01-23-2012 at 02:00 PM.

01-23-2012, 02:50 PM	#10
dlbehrns MBWorld Fanatic! Garage is empty, add now Join Date: May 2007 Location: Nebraska Posts: 1,009 Drives: 99CLK320,	Hey slo, I was looking at the left/passenger back side of the engine by the firewall. Is that not the TB? __________________ 99CLK320-One day I woke up and my slab had morphed into a McLaren MP4-12C INMotionusa Chip Tune, Sprintbooster, VIPclk320's cold air ram intake and front & rear strut bars, Ghostrider's short tube headers and rear camber kit, MB front control arm camber bolts, Vogtland Springs, Bilstein Sport shocks, Goodridge stainless braided brake lines. Wish list: SuperSprint resonator and muffler, seconary cats deleted.

01-23-2012, 03:14 PM	#11
slobodan Member Garage is empty, add now Join Date: Feb 2011 Location: Louisville, Ky Posts: 83 Drives: 1999 CLK 320	Its located center rear of the motor. Just follow you air intake and it will lead you to it.

01-23-2012, 03:14 PM
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