only heat comes out of defroster
#1
Junior Member
Thread Starter
Join Date: May 2009
Posts: 40
Likes: 0
Received 1 Like
on
1 Post
Year: 1990
Model: Cherokee
Engine: 4.0
only heat comes out of defroster
I have 1990 cherokee xj
When i turn on my heater or air conditioner air only comes out of the defroster. No air comes out of vents. We took the heater valve out. When we blow thru it the valve opens and closes. So it seems to work. It worked fine until we replaced our overflow tank. Is there some vacuum hose we could have knocked lose that we are not seeing.
When i turn on my heater or air conditioner air only comes out of the defroster. No air comes out of vents. We took the heater valve out. When we blow thru it the valve opens and closes. So it seems to work. It worked fine until we replaced our overflow tank. Is there some vacuum hose we could have knocked lose that we are not seeing.
Last edited by katiness; 04-18-2011 at 11:28 AM.
#2
CF Veteran
Join Date: Sep 2010
Location: Milwaukee, WI
Posts: 21,168
Likes: 0
Received 5 Likes
on
5 Posts
Year: 1987
Engine: Check
None of my HVAC equip works so I'm just guessing here...
Its probably whatever directs airflow to the defrost or vent or floor. Not sure if its cable or vacuum controlled.
Its probably whatever directs airflow to the defrost or vent or floor. Not sure if its cable or vacuum controlled.
#4
Member
Join Date: Jan 2010
Location: Moses Lake Wa
Posts: 208
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1989
Model: Cherokee
I'm having the same issue. Only mine started after I moved the vacuum canister. Worked before but not now. Defrost only, everything seems to be connected. Hope you find the issue.
#6
Senior Member
Join Date: Nov 2009
Location: McCall,Idaho
Posts: 539
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1991
Model: Cherokee
Engine: 4.0L high output with compressed valves
vacuum egg check the vacuum resevoir by the side bumper on the passenger side in the front
#7
Senior Member
Join Date: Apr 2010
Location: Marshall, WI
Posts: 720
Likes: 0
Received 1 Like
on
1 Post
Year: 1994
Model: Cherokee
Engine: 4.0L i6
what goblinish15 said!!
i had the same issue, hose came off the conaster, would only blow as defroster. hooked it back up, perfecto!!!
i have a 94 and it was located behind the front bumper, passanger side. super easy to get to.
i had the same issue, hose came off the conaster, would only blow as defroster. hooked it back up, perfecto!!!
i have a 94 and it was located behind the front bumper, passanger side. super easy to get to.
Trending Topics
#8
Had the same issue.....when I change my front bumper out, I move the vacume cannister to the engine bay, shortened the vacume line and reconnected.....Now my heater and A/C are working perfectly. So is the cruise control...all controlled by that stupid cannister.
Thread
Thread Starter
Forum
Replies
Last Post
LittleRed94
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
5
10-06-2015 08:09 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)