1992 Cherokee Laredo AUX fan only turns on with a/c? - JeepForum.com
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep Cherokee & Comanche Forums > XJ Cherokee Technical Forum > 1992 Cherokee Laredo AUX fan only turns on with a/c?

Engo winches available at www.rockridge4wd.com! Free shippRockridge 4WD IS Taking Zone Offroad Suspension Lift Kits ZONE 4.25" combo lift for TJ available at Rockridge4w

Unread 05-16-2013, 02:28 PM   #1
Registered User
2000 TJ Wrangler 
Join Date: Jan 2009
Location: Colorado Springs
Posts: 577
1992 Cherokee Laredo AUX fan only turns on with a/c?

Hi all,

Been having some warmer weather here in Colorado and was driving around and noticed the jeep was running hot. Between 210 & 230. Only was getting hot when sitting at a light. Long story short the Aux cooling fan only comes on with the a/c on. It won't come on when the jeep is getting hot. If im not mistaken it should. So what controls the on/off of the aux fan with excessive temp?

1992 Jeep Cherokee Laredo
4.0L Inline 6

MikeyJ is offline   Reply With Quote
Unread 05-16-2013, 03:02 PM   #2
Paradise XJ
Registered User
1990 XJ Cherokee 
Join Date: Jan 2007
Location: Paradise, CA, Northern California
Posts: 2,143
On your 92 the temp sensor in the thermostat housing tells the computer to turn the fan on.

If you unplug it, the fan should come on...if that happens, replace the sensor.
1990 XJ Laredo - White & Chrome
1988 MJ Pioneer - Metallic Green and Black
Paradise XJ is offline   Reply With Quote
Unread 05-16-2013, 07:47 PM   #3
Registered User
1994 XJ Cherokee 
Join Date: Apr 2010
Location: College Station, Texas
Posts: 120
and when you unplug the ect the check engine light will come on so after you figure it out unhook the battery for 30 min to reset KAM(keep alive memory) which will reset fuel trims and idle so when you start it up have the A/C off so it relearns the idle with out the load or else when the A/C kicks on it might die or idle too high.
Rosati21 is offline   Reply With Quote

Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.