Fan outlet on driver's side blowing cold when heater is on

G

geberhard

Douchebag

• Mar 15, 2016

• #1

Teh heater is working greta on teh Jeep, however I noticed the fan outlet to the left of the driver side is blowing cold air compared to the 3 other fan outlets on the dash. Has anyone experienced similar issues? I have not taken the JK dash apart yet, could be a door\portlet issue? This is on a 2010 JK Rubicon.

Thanks!

Gui

 

MTG

Caught the Bug

• Mar 15, 2016

• #2

Sounds like a blend door problem. :idontknow:

 

G

geberhard

Douchebag

• Mar 15, 2016

• #3

MTG said:

Sounds like a blend door problem. :idontknow:

Click to expand...

thanks, I am going to do the steering wheel\bag switch fix fairly soon so may take a stab at checking the blend doors. It is weird since only one outlet has cool air...

Gui

 

MTG

Caught the Bug

• Mar 15, 2016

• #4

geberhard said:

thanks, I am going to do the steering wheel\bag switch fix fairly soon so may take a stab at checking the blend doors. It is weird since only one outlet has cool air...

Gui

Click to expand...

Yeah, I would have thought at least 2 would be blowing cold air. It's been a while since I looked at this. But blend door still seems like the culprit. At least where I would start.

 

WJCO

Meme King

• Mar 15, 2016

• #5

I looked at two vehicles last week with similar symptoms. One was a Jeep, one was a Dodge truck. I don't the the exact customer symptom in front of me, but one side of dash was cold and one was hot. Both needed heater cores. Tech said it was fairly common. Only part of the heater core gets restricted with some kind of sludge and where the fan is located, it causes air to blow over the restricted part. I would at least do some research on that. There was a tech bulletin on it.

 

G

geberhard

Douchebag

• Mar 15, 2016

• #6

Great info, thanks! I found a bulletin with some info related to the blockage (seems like sand segmentation), that accumulates there. One other bulletin indicated dialation on the plastic door.

One thing I just noticed when I took it for a drive, if I block the driver right vent, the driver left vent warms up, so that may throw out the heater core option?