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
68,475

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

Grand Cherokee
Looking for a Used Grand Cherokee in your area?
CarGurus has 57,745 nationwide Grand Cherokee listings starting at $1,188.
ZIP:

Search Jeep Grand Cherokee Questions

Jeep Grand Cherokee Experts

#1 Tom Demyan
Tom Demyan
Reputation 1,100
#2 thejeepdoctor
thejeepdoctor
Reputation 1,040
#3 inuevafreak
inuevafreak
Reputation 980
View All

Related Models For Sale

Used Jeep Wrangler"
351 Great Deals out of 42,406 listings starting at $1,800
Used Ford Explorer"
637 Great Deals out of 39,828 listings starting at $1,295
Used Toyota 4Runner"
195 Great Deals out of 10,709 listings starting at $2,000
Used Chevrolet Tahoe"
403 Great Deals out of 26,743 listings starting at $2,999
Used Jeep Liberty"
335 Great Deals out of 8,677 listings starting at $2,400
Used Dodge Durango"
208 Great Deals out of 19,944 listings starting at $1,299
Used Ford F-150"
1,907 Great Deals out of 114,658 listings starting at $1,455
Used BMW X5"
268 Great Deals out of 11,049 listings starting at $2,488
Used Ford Mustang"
665 Great Deals out of 31,670 listings starting at $1,950
Used Chevrolet Silverado 1500"
1,570 Great Deals out of 131,841 listings starting at $1,450

Used Cars For Sale

2015 Jeep Grand Cherokee Laredo 4WD For Sale
4,814 listings starting at $27,993
2014 Jeep Grand Cherokee Laredo 4WD For Sale
16 Great Deals out of 630 listings starting at $21,900
2013 Jeep Grand Cherokee Laredo 4WD For Sale
28 Great Deals out of 793 listings starting at $18,609
2012 Jeep Grand Cherokee Laredo 4WD For Sale
67 Great Deals out of 1,860 listings starting at $15,977
2011 Jeep Grand Cherokee Laredo 4WD For Sale
29 Great Deals out of 1,059 listings starting at $13,950