Jeep started overheating.

[Dmoney13]

I have a 2021 Jeep Rubicon with a 2.0 L. My daughter said all of a sudden the temperature gauge went all the way to the top. So she turned off the air conditioner, turned on the heater and it went away and she drove the rest of the way home. There is no leaks. The coolant is full. She got back in it to drive it again and it came back again. Does anybody have any clue as to what this could be.

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[yokramer]

Did you check your coolant level and make sure it was bled after?

Is your fan for sure working?

 

[alphawolff]

You sure it's full?

 

[Medsker]

My 2.0 was doing that and I couldn't figure out what it was. I checked levels of fluid, I took it to the dealer 4 times, replaced the thermostat, and I used JScan to turn my fan on high at all times. None of these worked. Mine eventually overheated and burned down. I'm not saying that will happen to hers but tell her to be careful and pay attention and not let it get too hot. I was going up a hill when it did it and couldn't get pulled over for a few seconds. Mine would mainly do it at higher speeds going up hills.

 

[mwilk012]

Prove that it’s full.

 

[dstevens]

The 2.0T is notorious for leaking at the expansion tank (plastic, immediately above the turbocharger) and two tee fittings for heater lines (also plastic and also near the turbocharger). In most cases they have a red crust around them when leaking.

To check the coolant level you really need to fold the hood back onto the windshield, stand on the bumper and shine a flashlight straight down into the expansion tank. The dipstick can disagree with the actual level.

By my guess is that the radiator fan has failed.

 

[Terrymo]

The 2.0T is notorious for leaking at the expansion tank (plastic, immediately above the turbocharger) and two tee fittings for heater lines (also plastic and also near the turbocharger). In most cases they have a red crust around them when leaking.

To check the coolant level you really need to fold the hood back onto the windshield, stand on the bumper and shine a flashlight straight down into the expansion tank. The dipstick can disagree with the actual level.

By my guess is that the radiator fan has failed.

Is the radiator fan failing common?

 

[MyKeg]

Make sure you check both tanks in the 2.0. The clear one is usually fine, but the black one closer to the firewall can be problematic. It sounds allot like what happened to mine a couple years back. I let it go too long because I didn't realize there was a second tank and ended up melting a few extra parts that made repairs much more involved.

 

[ScotM]

Pressure test the cooling system.

 

[mwilk012]

Is the radiator fan failing common?

No. People checking the wrong reservoir is.

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