A/c-Heat-Fan Questions

NW-ZJ-SCOTT

TEXAS-JT-SCOTT

NAXJA Member

Location

NE Texas

• Jul 8, 2008

• #1

Havnt had the jeep to long.. few months, The heat works.. but the ac does not..

First of all, For some reason i dont get much "Pressure" from the fan, it seems to just Flow out at one steady pace on any "Speed selection"...

I'd like to fix this problem that seems to be "Common" within my group of XJ's.. and get my A/C goin. I have some money this weekend. but i cant afford a dealership to Charge me $500+/-

where should i start!

 

R

rogersjeep

NAXJA Forum User

Location

Pearland Texas

• Jul 8, 2008

• #2

What year, make, and or model. These bits of info will help someone answer your question.

 

NW-ZJ-SCOTT

TEXAS-JT-SCOTT

NAXJA Member

Location

NE Texas

• Jul 8, 2008

• #3

ahh i do that every time..

1989 pioneer 4liter

 

NW-ZJ-SCOTT

TEXAS-JT-SCOTT

NAXJA Member

Location

NE Texas

• Jul 9, 2008

• #4

ttt

 

Shorty

NAXJA Forum User

NAXJA Memorial Lifetime Member

Location

on the beach in Ocean View, VA

• Jul 9, 2008

• #5

from indide the engine bay, pull the blower motor and clean out any garbage/ dead squirrils in there first. Check the blower resistor under the dash for continuity between each terminal (search and you'll find locations) and then dig deeper and verify that all the ducts are attached securely under the dash.
the blend door and position doors are vacuum actuated, but if you get the correct temp in the correct locations, that shouldn't be the problem-- never hurts to double check, though.

 

D

DougJ

NAXJA Forum User

Location

Prather, CA

• Jul 9, 2008

• #6

Or dead mice...

I'm not familiar with what's going on inside the heater/AC box on the early Jeeps, but you're saying it works fine until you select AC. If you're getting full airflow until you select AC then perhaps you've got an issue with one of the doors inside the box. They're vacuum driven on my '01, if they are on the '89 also then it could be one of the lines or actuators.

 

NW-ZJ-SCOTT

TEXAS-JT-SCOTT

NAXJA Member

Location

NE Texas

• Jul 9, 2008

• #7

noo not just ac.. The fan itsself does not "Blow" it "Vents" air, Regardless of Heat or A/c...i think i have two issues.. Fix fan.. Then "Charge" a/c

 

8

89CherokeePioneer

NAXJA Forum User

Location

Massachusetts

• Jul 9, 2008

• #8

Get a test light for the blower motor-sounds like its not working at all. A 12v bulb would be fine. I assume you checked the fuses underneath the dash by the footwell?

You need to fix the fan then charge the A/C.

 

D

DougJ

NAXJA Forum User

Location

Prather, CA

• Jul 9, 2008

• #9

nw-xj-scott said:

noo not just ac.. The fan itsself does not "Blow" it "Vents" air, Regardless of Heat or A/c...i think i have two issues.. Fix fan.. Then "Charge" a/c

Click to expand...

OK, that's more clear. Some basic troubleshooting on the fan should get you pointed in the right direction.