Overheating issue

Choirck16
45

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
65

Did you try replacing your thermostat?

2 out of 2 people think this is helpful.
Choirck16
45

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
56,785

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
45

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.

3 out of 3 people think this is helpful.
Choirck16
45

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
0

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.

Your Answer

Add photo

Related Questions

Grand Cherokee
Looking for a Used Grand Cherokee in your area?
CarGurus has 56,209 nationwide Grand Cherokee listings starting at $995.
ZIP:

Search Jeep Grand Cherokee Questions

Jeep Grand Cherokee Experts

#1 Tom Demyan
Tom Demyan
Reputation 830
#2 thejeepdoctor
thejeepdoctor
Reputation 690
#2 tenspeed
tenspeed
Reputation 690
View All

Related Models For Sale

Used Jeep Wrangler"
1,320 Great Deals out of 51,507 listings starting at $1,800
Used Ford Explorer"
1,008 Great Deals out of 52,742 listings starting at $1,495
Used Toyota 4Runner"
377 Great Deals out of 11,640 listings starting at $1,499
Used Chevrolet Tahoe"
989 Great Deals out of 29,112 listings starting at $2,800
Used Jeep Liberty"
538 Great Deals out of 9,299 listings starting at $1,695
Used Dodge Durango"
430 Great Deals out of 21,247 listings starting at $1,495
Used Ford F-150"
3,059 Great Deals out of 152,615 listings starting at $1,000
Used BMW X5"
356 Great Deals out of 10,283 listings starting at $2,995
Used Chevrolet Silverado 1500"
2,483 Great Deals out of 171,487 listings starting at $650
Used Ford Escape"
1,332 Great Deals out of 59,924 listings starting at $1,400

Used Cars For Sale

2014 Jeep Grand Cherokee Laredo 4WD For Sale
17 Great Deals out of 539 listings starting at $24,350
2013 Jeep Grand Cherokee Laredo 4WD For Sale
19 Great Deals out of 365 listings starting at $19,599
2012 Jeep Grand Cherokee Laredo 4WD For Sale
94 Great Deals out of 1,818 listings starting at $17,185
2011 Jeep Grand Cherokee Laredo 4WD For Sale
109 Great Deals out of 1,581 listings starting at $15,988