Overheating issue

Choirck16
65

Asked by Choirck16 May 21, 2013 at 01:57 PM about the 2003 Jeep Grand Cherokee Laredo 4WD

Question type: Maintenance & Repair

Last summer, my jeep overheated. A friend of mine said it was probably the sensor, since the fan would work when he tested it, so he ghetto rigged the fan to a fuse inside the car. The connection was shotty at best and kept coming out. I didn't have issues during the winter as it's cool around here. Now that it is getting warm, the Jeep started overheating again. I had someone else look at it and determine at some point that the fan motor burned out. It was replaced, but still had the wire rigged to a fuse to turn on with the ignition. The connection still sucked. So I decided to replace the sensor. I paid a shop to replace the sensor. Now the fan doesn't come on at all. After doing some driving, the water boils. Every time. Sometimes it will get so hot it will boil over. I have to wait for it to cool off and put more water in. I was going to buy the relay switch, but I want to know before I do if this is the issue or if I'm overlooking something else. I don't want to keep just replacing parts and have it continue to not work. Thank you for your help.

7 Answers

lfeqlbrm
75

Did you try replacing your thermostat?

2 out of 2 people think this is helpful.
Choirck16
65

No, I have not. But it does register the temp on my gauges. Would the thermostat cause the fan not to come on when it's supposed to?

1 out of 1 people think this is helpful.
tenspeed
67,405

The engine is not supposed to over heat at all. Having the fan running does not cure the problem. The only time the fan should energize is when you're stuck in stop and go traffic or the Jeep is towing heavy loads up hills. Sometimes they come on with the air conditioning.

Choirck16
65

My jeep doesn't overheat just driving. If I'm doing freeway driving or not much stop and go it's fine. It's only when I'm doing a lot of in town, stop and go driving (ie: lots of traffick, Idling, things like that) and on warm days. I know that the fan is not coming on when it is supposed to and that is the issue with the overheating. When the fan was hooked up to the fuse box and it was coming on all the time, it was staying below temperature. It does not turn on when I idle (even if the engine is getting hot). I'm trying to find the issue with why the fan would not be turning on.

5 out of 5 people think this is helpful.
Choirck16
65

Anyone have any help for me????

sworrl
60

No answer yet but i have a similar issue. When my Ac is on the engine begins to overheat. When i turn the AC off, it cools back down. The pwm fan seems to be spinning slowly and i wanted to test it. What wires to i jumper to test that the fan is good?

6 out of 6 people think this is helpful.
memeselfandi
10

There's a fan relay located under the right head light. You either remove the bumper or cut into the headlight plastic mounting to get to it. I cut into the mounting, bend it out, replace the relay and tape it back with duck tape. The headlight assembly slide over it. No one will see.

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

  • overheating, 5 answers

    changed fan and thermostat, still overheating and now a/c just blows hot air

    1999 Jeep Grand Cherokee

    -

    Maintenance & Repair

  • the jeep overheated and was making unusual noises and overheated and now it sounds like its not running on all cylinders 2 answers

    1998 Jeep Grand Cherokee Laredo

    -

    Maintenance & Repair

  • 2003 Jeep Grand Cherokee Overheating When Idling? 2 answers

    Hi, I'm a 32 year old female so please bear with me as I am probably not as mechanically inclined as most guys! I have a 2003 Jeep Grand Cherokee Lerado. It does not have a towing package. Last summ...

    2003 Jeep Grand Cherokee Laredo 4WD

    -

    Maintenance & Repair

  • A/C issues 1 answer

    '04 grand cherokee When A/C is on it will intermittently switch to blowing out of the dash. Anyone know what's up?

    2004 Jeep Grand Cherokee

    -

    Maintenance & Repair

  • 1999 Jeep Cherokee Overheating 3 answers

    I just bought a 1999 Jeep Cherokee. Supposedly it just had $2k worth of work on it and the seller said it runs with no issues. However, I've had problems with it overheating. It will run fine, so...

    1999 Jeep Cherokee 4 Dr Sport 4WD

    -

    Maintenance & Repair

Grand Cherokee
Looking for a Used Grand Cherokee in your area?
CarGurus has 56,179 nationwide Grand Cherokee listings starting at $1,400.
ZIP:

Search Jeep Grand Cherokee Questions

Jeep Grand Cherokee Experts

#1 Tom Demyan
Tom Demyan
Reputation 1,080
#2 thejeepdoctor
thejeepdoctor
Reputation 990
#3 inuevafreak
inuevafreak
Reputation 940
View All

Related Models For Sale

Used Jeep Wrangler"
483 Great Deals out of 43,070 listings starting at $1,800
Used Ford Explorer"
777 Great Deals out of 43,510 listings starting at $975
Used Toyota 4Runner"
249 Great Deals out of 9,938 listings starting at $1,490
Used Chevrolet Tahoe"
493 Great Deals out of 25,308 listings starting at $1,955
Used Jeep Liberty"
328 Great Deals out of 8,185 listings starting at $1,499
Used Dodge Durango"
235 Great Deals out of 18,947 listings starting at $1,000
Used Ford F-150"
2,076 Great Deals out of 109,817 listings starting at $1,350
Used BMW X5"
377 Great Deals out of 11,516 listings starting at $2,359
Used Chevrolet Silverado 1500"
1,588 Great Deals out of 138,412 listings starting at $1,500
Used Ford Mustang"
613 Great Deals out of 33,963 listings starting at $1,595

Used Cars For Sale

2015 Jeep Grand Cherokee Laredo 4WD For Sale
4 Great Deals out of 4,312 listings starting at $27,999
2014 Jeep Grand Cherokee Laredo 4WD For Sale
15 Great Deals out of 545 listings starting at $22,987
2013 Jeep Grand Cherokee Laredo 4WD For Sale
28 Great Deals out of 690 listings starting at $19,658
2012 Jeep Grand Cherokee Laredo 4WD For Sale
86 Great Deals out of 1,900 listings starting at $16,910
2011 Jeep Grand Cherokee Laredo 4WD For Sale
47 Great Deals out of 1,068 listings starting at $14,995