Sprinter-Forum    
 

Go Back   Sprinter-Forum > T1N Sprinters > T1N Talk

T1N Talk General Discussions related to T1N Sprinters.


Reply
 
Thread Tools Display Modes
Old 02-09-2012, 06:31 PM   #1
katmat
 
Join Date: Jul 2008
Location: Illinois
Posts: 220
Thanks: 24
Thanked 20 Times in 19 Posts
Default Defroster not working

I've got a 05 3500.
The heater control is not working. is there a cable behind the control knob/ If so how easy os it to get to. I get heat out of the center vents but not the floor or defroster, no matter how I
turn the controller.
Thanks,
Matt Murphy
katmat is offline   Reply With Quote
Old 02-09-2012, 06:37 PM   #2
cahaak
 
cahaak's Avatar
 
Join Date: Oct 2009
Location: MN
Posts: 1,082
Thanks: 25
Thanked 543 Times in 354 Posts
Default Re: Defroster not working

There are cables that connect at the back of the ATC (which is the entire controller - all three knobs together). Check on the forum here for instruction on how to remove it. Just require removing a few Torx screws and some center dash pieces, fairly easy. The cable may have come off. You will just tip that control out, you can't pull it out the whole way because of the cables attached at the back. See what the status is, If one is broken, then you have a lot more work. In any case, make sure you lube them with some decent lubricant like 3 in 1 oil or such. Mine were quite stiff initially, I had checked them because my AC was not working and lubed them then. They work very smoothly now.

Chris
__________________
2006 140" passenger
normal roof with rear AC
7 kids and a whole lot of hauling
cahaak is offline   Reply With Quote
Old 02-09-2012, 07:10 PM   #3
jmoller99
Own a DAD ODB2 Unit.
 
jmoller99's Avatar
 
Join Date: Mar 2010
Location: Colorado Springs, Co
Posts: 1,499
Thanks: 151
Thanked 781 Times in 488 Posts
Default Re: Defroster not working

You might also check your cabin filter to see if its clogged up. When I bought my Sprinter I had similar problems. Changing the cabin filter allowed enough airflow to allow air to flow on the windshield and be directed to the floor.

I also ended up lubing the pull cables on the center vent control (you can get to them if the radio is out, otherwise, there is a lot to take apart on the console to get to them). However, I had one of the pull cables flexing under compression - I added a small spring to help pull it back (the console has to come apart to add it).

My fix is in the later entries here: http://sprinter-source.com/forum/showthread.php?t=2058
__________________
2002 Freightliner Cargo T1N. 140 WB

Last edited by jmoller99; 02-09-2012 at 09:06 PM.
jmoller99 is offline   Reply With Quote
Old 02-10-2012, 05:07 PM   #4
hkpierce
'02 140 Hi BlueBlk Pass
 
Join Date: Sep 2006
Posts: 2,208
Thanks: 302
Thanked 1,019 Times in 492 Posts
Default Re: Defroster not working

I find the defroster is very inefficient. Before tearing anything apart, check by turning up the fan speed to 4 and closing all 6 vents - including the center 2. If that doesn't do it, then no choice.
hkpierce is offline   Reply With Quote
Old 02-10-2012, 07:51 PM   #5
jmoller99
Own a DAD ODB2 Unit.
 
jmoller99's Avatar
 
Join Date: Mar 2010
Location: Colorado Springs, Co
Posts: 1,499
Thanks: 151
Thanked 781 Times in 488 Posts
Default Re: Defroster not working

I agree that the defroster mode is not very aggressive. When its real cold and snowy out, I find I go thru a lot of windshield washer fluid to keep the windshield clear. Ice on the windshield is also solved in that way.

When I could only get warm air thru the dash vents, it was solved by spraying graphite lub on and in the pull cables behind the air/heat/vent control unit (the one with the knob you are trying to turn to get the air directed to the floor and/or windshield). This is a common issue.

You might consider replacing the light bulbs in that control unit if you have it apart to lubricate.
__________________
2002 Freightliner Cargo T1N. 140 WB
jmoller99 is offline   Reply With Quote
Old 02-10-2012, 09:37 PM   #6
cahaak
 
cahaak's Avatar
 
Join Date: Oct 2009
Location: MN
Posts: 1,082
Thanks: 25
Thanked 543 Times in 354 Posts
Default Re: Defroster not working

Concur, the defrost of the windshield is not very effective. In the manual, they state you need to run the fan on 4 to get it to work. It does not seem to deliver that much air volume to the windshield, but on 4 with the temp on complete hot, it does do the job. But, you wait a long time if you don't manually scrape the outside in the morning!

Chris
__________________
2006 140" passenger
normal roof with rear AC
7 kids and a whole lot of hauling
cahaak is offline   Reply With Quote
Old 02-11-2012, 04:36 AM   #7
thinice
2005 tall 140WB 160K
 
Join Date: Jan 2010
Location: Mile 850.1 Upper Mississippi River
Posts: 177
Thanks: 198
Thanked 33 Times in 28 Posts
Default Re: Defroster not working

Had a similar problem on my neglected 2005. The cable was kinked and needed lube. Not to difficult (I did it, and I am not a mechanic) to pull the unit far enough out to straighten or reattach, then lube.
thinice is offline   Reply With Quote
The Following User Says Thank You to thinice For This Useful Post:
outbound (09-26-2016)
Old 09-24-2016, 08:14 PM   #8
outbound
 
Join Date: Jan 2016
Location: SLC
Posts: 399
Thanks: 337
Thanked 87 Times in 75 Posts
Default Re: Defroster not working

i'm also having this problem (on an 06(dodge)2500)
no air comes out of the windshield/defroster vents, no matter what settings, no matter how fast the fan.

is there a precise setting of the knobs that does the trick, or does the control system (cables, vents, flaps) have a problem?

reason i ask about this, is the manual is somewhat less than clear (to me) about how to set the knobs to get airflow onto the windshield

the guy at the local dealer said something to the effect that: 'oh yeah, have seen that before, had to take the entire dash/console apart to fix it, cost appx 2000bux'

HUH?!! (getting the idea these things are like a B.O.A.T. = 'Bring Over Another Thousand' ;)

any insights on this one very much appreciated (esp since we got the white stuff up high this morning and time grows short to work outdoors)

Last edited by outbound; 09-24-2016 at 08:36 PM.
outbound is offline   Reply With Quote
Old 09-26-2016, 03:18 AM   #9
jmoller99
Own a DAD ODB2 Unit.
 
jmoller99's Avatar
 
Join Date: Mar 2010
Location: Colorado Springs, Co
Posts: 1,499
Thanks: 151
Thanked 781 Times in 488 Posts
Default Re: Defroster not working

If you have a clogged cabin filter you won't have much of any defroster air flow. When did you change it last?

I change mine every 2 years. It's in the engine compartment, above the engine.
__________________
2002 Freightliner Cargo T1N. 140 WB

Last edited by jmoller99; 09-26-2016 at 03:21 AM.
jmoller99 is offline   Reply With Quote
The Following User Says Thank You to jmoller99 For This Useful Post:
outbound (09-26-2016)
Old 09-26-2016, 11:57 PM   #10
outbound
 
Join Date: Jan 2016
Location: SLC
Posts: 399
Thanks: 337
Thanked 87 Times in 75 Posts
Default Re: Defroster not working

hey jmoller, thanks for the comeback!

'cabin filter' ?
didnt know there was one - or guess maybe that have noted something about it somewhere - but my other guess would be that it likely wasnt ever changed.

will look into that, soon as i get finished changing the glowplugs (which will happen soon as i figger out how to get the elec conns unplugged ;)

but a question, if you/anybody could maybe show me a photo of how the knobs need to be set to have airflow out of the defrost vents?
the manual is somewhat less than helpful (and theres like waaaay more settings than on any other vehicle i've ever...)
__________________
my rig: 2006(dodge)2500/140wb/hitop

me: marine electrical, refrigeration & corrosion specialist (ABYC certs), off-grid power/refrig consulting 25+years
(and with the sprinter, now re-learning everything i ever knew about vehicles :)
outbound is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



All times are GMT. The time now is 05:54 AM.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2016, Jelsoft Enterprises Ltd.