No air coming through any vents when cold outside - JeepForum.com

 
LinkBack Thread Tools
post #1 of 15 Old 12-30-2015, 09:43 PM Thread Starter
wassy
Registered User
2000 TJ Wrangler 
 
Join Date: Nov 2006
Location: Colorado
Posts: 142
No air coming through any vents when cold outside

Hi all, so I've been having this issue for a while on my 2000 wrangler, I'm not getting any airflow coming out of any of my vents only when it's teens and below outside otherwise the whole system works flawlessly. I can see and hear the fan spinning at all different speeds, I can see the actuators opening and closing, and I can feel heat coming through the vents. What could it be??? please any suggestions? I'm sick of being cold!! haha

wassy is offline  
Sponsored Links
Advertisement
 
post #2 of 15 Old 12-30-2015, 09:58 PM
MoFarmBoy
Registered User
2006 TJ Wrangler 
 
Join Date: Aug 2013
Posts: 65
I'm a bit confused by your description of symptoms. You say no air, but you feel tepid heat coming out of the vents?

If your engine temperature is normal, and the fan and actuator are working properly, I would suspect an obstructed heater core. At operating temperature, grasp the core input and output hoses. If there is a marked difference in warmth, coolant is not circulating properly.

It may be time to flush that core.
MoFarmBoy is offline  
post #3 of 15 Old 12-30-2015, 10:24 PM
btn
Registered User
2000 TJ Wrangler 
 
Join Date: Jan 2010
Location: Crawlorado
Posts: 617
Sounds like the blower motor or resistor is dying: Not turning the proper RPMs to get the proper flowrate. Or maybe the air intake under the hood grill is obstructed.

2000 TJ, 4.0L, 4" short arm suspension lift, 35" tires, Rear D44 and front HP30 both with ARBs and chromo shafts, NV3550.
btn is offline  
post #4 of 15 Old 12-31-2015, 12:35 AM
Jeepster83
Registered User
2003 TJ Wrangler 
 
Join Date: May 2008
Location: Aurora
Posts: 3,257
When you change to mode (face, feet, etc.) can you hear the doors moving? If you can feel temperature change when you move the hot/cold dial then the blend door(s) works. But no flow from the vents would be a mode door problem. You also say the fan works fine at any speed?

Quote:
Originally Posted by mrblaine View Post
Being right has nothing to do with arrogance. It's only perceived that way by those that are wrong.
WyoTech West Sacramento - Graduated 8/19/2011

Back into my Jeep... finally.
Jeepster83 is offline  
post #5 of 15 Old 12-31-2015, 05:34 AM Thread Starter
wassy
Registered User
2000 TJ Wrangler 
 
Join Date: Nov 2006
Location: Colorado
Posts: 142
Yes I can feel tepid heat coming from vents, and I can hear the fan spinning at different rpms when selected. The weird thing is that it only does this when it's really cold outside when it's warmer it works fine.
wassy is offline  
post #6 of 15 Old 12-31-2015, 09:55 AM
98TJSE
Registered User
1998 TJ Wrangler 
 
Join Date: Oct 2014
Location: Sudbury
Posts: 978
well when its warmer... it dosent need to heat up air as much, when colder it takes more heat to heat up that colder air... kind alike summer your engine hits operating temp fast.. in -40 takes a few minutes more lol , so it sounds as heatercore is blocked up, can try reverse flushing, then last replaceing the heatercore..
98TJSE is offline  
post #7 of 15 Old 12-31-2015, 01:09 PM Thread Starter
wassy
Registered User
2000 TJ Wrangler 
 
Join Date: Nov 2006
Location: Colorado
Posts: 142
How that would affect the air speed though?
wassy is offline  
post #8 of 15 Old 12-31-2015, 01:15 PM
98TJSE
Registered User
1998 TJ Wrangler 
 
Join Date: Oct 2014
Location: Sudbury
Posts: 978
well .. your sayign warm air vs lack of air.. you got 2 different issues your saying.. is it low air or warm(not hot) as tepid means


you were asked if fan works at any speed and you responded YES.... this is were your confusing me now..
98TJSE is offline  
post #9 of 15 Old 12-31-2015, 01:42 PM Thread Starter
wassy
Registered User
2000 TJ Wrangler 
 
Join Date: Nov 2006
Location: Colorado
Posts: 142
Haha yes the fan works at all speeds but the air doesn't come through any vents, the heat does work because I can feel warm air through the vents it just doesnt blow out.
wassy is offline  
post #10 of 15 Old 12-31-2015, 01:50 PM
98TJSE
Registered User
1998 TJ Wrangler 
 
Join Date: Oct 2014
Location: Sudbury
Posts: 978
ah okay

you got AC? if so maybe its low and freezing up in lower temps? if equipped maybe remove compressor solenoid or fuse? from distribution box? since you say warmer weather it all works fine..
98TJSE is offline  
post #11 of 15 Old 12-31-2015, 01:53 PM Thread Starter
wassy
Registered User
2000 TJ Wrangler 
 
Join Date: Nov 2006
Location: Colorado
Posts: 142
I'll go try that, yeah my ac lines get frosty I don't know why...
wassy is offline  
post #12 of 15 Old 12-31-2015, 02:02 PM Thread Starter
wassy
Registered User
2000 TJ Wrangler 
 
Join Date: Nov 2006
Location: Colorado
Posts: 142
Well that didn't work maybe because lines are still frozen?
wassy is offline  
post #13 of 15 Old 12-31-2015, 02:20 PM
98TJSE
Registered User
1998 TJ Wrangler 
 
Join Date: Oct 2014
Location: Sudbury
Posts: 978
possible.. if it freezes up it restricts airflow unplug and leave off....
98TJSE is offline  
post #14 of 15 Old 12-31-2015, 06:56 PM Thread Starter
wassy
Registered User
2000 TJ Wrangler 
 
Join Date: Nov 2006
Location: Colorado
Posts: 142
You sir are a genius, I just went for a drive with it unplugged to thaw it out and my heater was blowing full blast! thank you for your help.
wassy is offline  
post #15 of 15 Old 12-31-2015, 09:03 PM
98TJSE
Registered User
1998 TJ Wrangler 
 
Join Date: Oct 2014
Location: Sudbury
Posts: 978
yea so it seems your ac is low on refrigerant and freezing up , so might wanna get that checked or just leave it disabled for now....
98TJSE is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.



Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may 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
Trackbacks are Off
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome