Question about 1999 Jeep Cherokee

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Occasional overheating My 1999 Jeep Cherokee Laredo will overheat when idling or when driving slow and uphill with the AC running. The fan seems to be working fine and have had the radiator flushed but didn't help. Could it be the clutch fan? Thanks, Mary

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  • resorts Jul 18, 2008

    as you are driving or waiting at ared light heat guage travling back and forth

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2 Answers

The Fan Clutch Should NOT spin very easy, there should be a little resistance on it. The best way to check it it have someone in the car when it is on. Have them shut the car off and if the fan stops its good. If it continues to spin. it is bad. replace it

Posted on Jul 28, 2008

It is easy to check your fan clutch.With engine off and cool reach in and spin the fan blades.They should move real easy.Also make sure your radiator fins are not super dirty.

TK46

Posted on Jul 09, 2008

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======
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Three possible solutions:

1. Bad Thermostat

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3. Bad Fan

When the GC reaches a temp of 180 Deg. F the fan relay sends a signal to the fan to turn on, once the temp lowers (around 155 Deg. F) the relay turns off the fan, and so the cycle continues. If the relay is bad there will be no signal to the fan to run. While you are driving your vehicle there is ambient air moving thru the radiator, cooling the engine, but once you encounter slow/heavy traffic or stop there is no air moving and the temp goes up, the fan will not kick in and the vehicle will overheat.

If the fan motor is not working the same will happen, but a more expensive fix, as the motor comes with the fan.

If the Thermostat is stuck in the open position, the water travels to fast in the engine and heat exchanging is not an efficient process, therefore the vehicle might overheat when stopped or in slow traffic.

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ok.. got your problem...

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Regards,
micro

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