Car Tech forum


2000 jeep grand cherokee laredo wanting to overheat

by azjeepgirl / October 25, 2012 12:26 PM PDT

Wants to overheat and go into the "red zone" but as long as I keep the heater on high/defrost and go above 35 mph, it seems to stay just past the line before the red zone. If I'm going slow then it creeps towards the red-zone but as soon as I'm going fast again it seems to cool off.

I've had the transmission flushed, the radiator flushed, put in new thermostat & gasket, new water pump, upper & lower radiator hoses, temperature sensor gauge and fan clutch.

No water in the oil or smoke out of tailpipe. Could it be a cracked head or ...?

Answer This Ask For Clarification
Discussion is locked
You are posting a reply to: 2000 jeep grand cherokee laredo wanting to overheat
The posting of advertisements, profanity, or personal attacks is prohibited. Please refer to our CNET Forums policies for details. All submitted content is subject to our Terms of Use.
Track this discussion and email me when there are updates

If you're asking for technical help, please be sure to include all your system info, including operating system, model number, and any other specifics related to the problem. Also please exercise your best judgment when posting in the forums--revealing personal information such as your e-mail address, telephone number, and address is not recommended.

You are reporting the following post: 2000 jeep grand cherokee laredo wanting to overheat
This post has been flagged and will be reviewed by our staff. Thank you for helping us maintain CNET's great community.
Sorry, there was a problem flagging this post. Please try again now or at a later time.
If you believe this post is offensive or violates the CNET Forums' Usage policies, you can report it below (this will not automatically remove the post). Once reported, our moderators will be notified and the post will be reviewed.

All Answers

Collapse -
Hope this helps
by rayzor20 / November 13, 2012 9:38 PM PST

It is very interesting that everything has been replaced except for your radiator fan and the relay that controls the fan unit.
A mechanics shop should be able to tell you if your fan is working by using a 6 volt latern battery and some speaker cable.
If the fan works then it is your relay that controls the fan that might have died. Link below

I replaced both in my jeep and overheating disappeared. Bought the repalcement fan from Ebay and fan relay from Oreilly's.

Collapse -
by azjeepgirl / November 14, 2012 2:44 AM PST
In reply to: Hope this helps

I will try that.

Popular Forums
Computer Help 49,613 discussions
Computer Newbies 10,349 discussions
Laptops 19,436 discussions
Security 30,426 discussions
TVs & Home Theaters 20,308 discussions
Windows 10 360 discussions
Phones 15,802 discussions
Windows 7 7,351 discussions
Networking & Wireless 14,641 discussions


CNET bought a house!

Take a look inside the house where we will be testing connected locks, thermostats and other smart home products so we can tell a complete story.