# Overheating jeep **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [July 1, 2007, 6:22pm UTC](https://community.cartalk.com/t/overheating-jeep/1174 "2007-07-01T18:22:09Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![cmech34](https://avatars.discourse-cdn.com/v4/letter/c/d2c977/32.png) [@cmech34](https://community.cartalk.com/u/cmech34)\ **Post date:** [July 1, 2007, 6:22pm UTC](https://community.cartalk.com/t/overheating-jeep/1174/1 "2007-07-01T18:22:09Z")
I have a 99 jeep grand cherokee 4.0l straight 6. I have changed the temp sensor and thermostat for the cooling. I jumpered the fan from the battery and it came on. but it wont come on by itself causing overheating issues. Any ideas\>? ---
**Author:** ![Joseph\_E\_Meehan](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/joseph_e_meehan/32/21_2.png) [@Joseph\_E\_Meehan](https://community.cartalk.com/u/Joseph_E_Meehan)\ **Post date:** [July 2, 2007, 12:02am UTC](https://community.cartalk.com/t/overheating-jeep/1174/2 "2007-07-02T00:02:28Z")
Some cars have more than one temperature sensor. My guess the sensor that actually controls the fan or the relay or wiring, is out. ---
**Author:** ![MG-McAnick](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mg-mcanick/32/188_2.png) [@MG-McAnick](https://community.cartalk.com/u/MG-McAnick)\ **Post date:** [July 2, 2007, 1:37am UTC](https://community.cartalk.com/t/overheating-jeep/1174/3 "2007-07-02T01:37:09Z")
Or the sensor or fan has come unplugged. If you wind up needing a new fan, it comes as a unit with a new shroud. Try 1-800-RADIATO. I put one of theirs in an '01 JGC yesterday