# Jeep wrangler temperature gauge

**URL:** <https://community.cartalk.com/t/jeep-wrangler-temperature-gauge/43806>\
**Category:** Maintenance/Repairs\
**Tags:** gauges, wrangler, jeep\
**Created:** [February 3, 2010, 10:49pm UTC](https://community.cartalk.com/t/jeep-wrangler-temperature-gauge/43806 "2010-02-03T22:49:08Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![djmclaughli](https://avatars.discourse-cdn.com/v4/letter/d/b2d939/32.png) [@djmclaughli](https://community.cartalk.com/u/djmclaughli)\
**Post date:** [February 3, 2010, 10:49pm UTC](https://community.cartalk.com/t/jeep-wrangler-temperature-gauge/43806/1 "2010-02-03T22:49:08Z")

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I have a 4 cylinder Jeep Wrangler. When I drive, the temperature guage will rise steadily to about 3/4 of the way up, and then drop back down to below 210. It does this pretty consistently. It never gets to the orange, and never overheats, but I’m nervous it will eventually. I topped off the reservoir and the radiator was full with clean looking fluid. There is some corrosion or buildup on the top part of the radiator. Any ideas what could be causint the temperature to fluctuate like that?

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**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\
**Post date:** [February 3, 2010, 10:57pm UTC](https://community.cartalk.com/t/jeep-wrangler-temperature-gauge/43806/2 "2010-02-03T22:57:57Z")

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The problem might be with a thermostat that’s opening late. Have you tried repalcing the thermostat?

Tester