Question about 1999 Jeep Cherokee

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Jeep Grand Cherokee running hot. I've changed the

Jeep Grand Cherokee running hot. I've changed the thermostat and still running hot.

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Check your radiator for external and internal obstructions (leaves, bugs etc on the a/c condenser or leaves between the condenser and radiator, rust or calcium deposits inside the radiator core all cause loss of heat transfer)
Also make sure that the system is full and that the electric fan and the clutch fan are operating properly. (electric fan should come on just above normal operating temp and clutch fan should not be "freewheeling" above temp either)
Note: If you need to have the radiator flushed, do it separately from the engine. especially the inline 6 and 4 engines rust up inside and if the system is flushed with the radiator connected, the debris will pack up inside it and actually can worsen the condition.

Posted on Apr 24, 2010

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Posted on Jan 02, 2017

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1 Answer

Jeep Grand Cherokee 3.1 2001 air con working but no hot air is it just thermostat need change or is it more problem?


Check hoses going to heater core. Do both get hot? If so, problem may be a "blend" door failing to actuate due to vacuum leaks or bad actuator. If neither get hot, change thermostat.

Feb 09, 2015 | 2001 Jeep Grand Cherokee

1 Answer

The temperature gauge on my 2000 Jeep Grand Cherokee started running hot (about 3/4 up), as soon as I start moving (even when the car is cold). It comes down to normal (about 50% on the gauge) when I stop...


Change the sensor, but it will run hot like that if you are not moving fluids across it. It is basically measuring air temp for a minute. Could be a totally stuck thermostat. Change both. That cooling system is critical on a cherokee.

Oct 08, 2013 | 2000 Jeep Grand Cherokee

1 Answer

2000 Jeep Grand Cherokee Leredo is overheating I changed thermostat also my fan is not working and keeps saying coolnd low and its full and the heat in the car will not run hot it stays cold


Sounds like some type of blockage in the system.
with the car cool open the radiator cap, start the engine to see if the coolant has flow.
Even though you just put in a new thermostat it can still be bad,I've had this happen to me a few times.
If the flow seems slow to nill you can also try removing the thermostat all together and giving that a try.
You can test the thermostat in a boiling pot of water.
If ir is totally not the thermostat then there could be a few cooling chambers blocked in the radiator.
This can be repaired in most cases by a "Rod out" at a local radiator shop.
I think the problem is more twards the thermostat for the reason you stated about your heater.
good luck,Gary.

Sep 21, 2011 | 2000 Jeep Grand Cherokee

1 Answer

AC, not blowing hot air, only cold air


yes its true, because most probally the termostast is slipping from inside which casues the termost to stay on the same tempreture.

Nov 15, 2009 | 2000 Jeep Grand Cherokee

1 Answer

OVER HEATING ISSUE!!! 2003 JEEP GRAND CHEROKEE


Since you added coolant, now it is time to check the fans. If the fans do come on, than your thermostat needs to be replaced, Should be done every 4 years anyways.

Jun 03, 2009 | 2003 Jeep Grand Cherokee

1 Answer

1998 jeep grand cherokee cooling problem


Your thermostat is stuck closed. It needs to be changed right away. By the way the operating temp on that motor is 160 degrees so you are running hot you have just been lucky so far. Good Luck

Dec 01, 2008 | 1998 Jeep Grand Cherokee

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