Question about 1996 Jeep Grand Cherokee

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Overheating problem, the cooling fan does not operate

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  • Anonymous Dec 31, 2008

    I have a 99 jeep gr ckerokee overheating .i've replaced fan, thermostat,and radiator.still running hot when idles .very puzzled asto what to do next.answers anyone?

  • Ed Woods
    Ed Woods May 11, 2010

    Check the cooling fan. See if the blade turns by hand. If it does are you able to check the wires to it for power and coninuity?

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  • Jeep Master
  • 6,982 Answers

Everyone keeps ignoring clutch fan on water pump. If it does not lock up when engine is hot, only the electric fan will be operating. With the undersized radiator used on Jeeps, it will cause overheating!!!

Posted on Dec 31, 2008

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1 Answer

Overheating when I sit idle.


Over heating the engine is a serious concern. With the hood raised you should hear the motorized fan turn on just behind the radiator as the engine requires additional cooling.. If you look in from the rear of the radiator you should see the fan blades.

This electric powered motor operates on a thermostat and when the engine temperature rises this fan should come on. I'm assuming from your description that when driving and air is flowing through the radiator as the car travels the engine is nor overheating.

Check fan motor thermostat, check fan motor and check wiring.

Wiring Diagrams related to the Honda Civic
http://www.wiringdiagrams21.com/category/automotive/honda-automotive/civic

Motor engine cooling fan only runs as engine temperature requires additional cooling.
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Jan 05, 2016 | 2001 Honda Civic

2 Answers

My car said "engine hot


Full coolant level does not mean your engine cannot overheat. You need to fix the problem as overheating will destroy the engine if not addressed.

The radiator cooling fans must be working, as must the water pump. The thermostat must also be working properly.
There must also be no air in the cooling system as air locks will impair water flow. When cooling systems are drained fully or partially and re-filled air in the system must be bled out using the correct bleeding procedure for the particular engine/cooling system. Failure to do this properly will lead to overheating.

If you ONLY see the overheating warning when running your aircon you need to check that the electric radaitor fans are kicking in at idle when you switch on and run the aircon and the engine has been warmed up some. If they do not start operating when the a/c is running you will get an overheating condition in normal driving conditions.

If the radiator fans are operating normally and you still get an overheating warning when the aircon is on or off the most likely culprit is a faulty thermostat in the engine's cooling system which will need to be replaced.

If you have either a faulty thermostat or if the water pump in the cooling system fails you will get continuous overheating whether the aircon is on or off.

Sep 05, 2011 | 2006 Chevrolet Impala

1 Answer

I have a 1998 1/2 Lincoln Town Car. Yes, some of the parts were changed over that year, as to why I am saying 98 1/2 At any rate, the car is overheating. I have changed the thermostat and radiator cap,...


maybe your cooling fan isnot working, electric under the hood.

Can you hear it come on when ou turn a/c on? It should also come on when engine coolant temp sensor gets hot enough to tell the computer to turn it on.

So, check fan motor operation ECT Sensor operation, & a/c making cooling fan run too.

Aug 22, 2011 | 1998 Lincoln Town Car

1 Answer

The truck is overheating every time the a/c is on but the thing is when the a/c is turning off and on every 10 seconds, and engine looses much power with a/c on... thanks


{: ) If the engine running performance is well and good without the a/c, observe the a/c compressor performance and cooling. A cycling compressor can be caused by high pressure on the discharge side. The higher the pressure, the more heat will be generated specially at the a/c condenser. Engine overheating and poor a/c cooling has one common factor: the engine cooling fans. Normally when you turn on a/c, additional load and heat will stress the engine. For the cooling fans, there is a low and hi speed. If these cooling fans do not operate at precise timing and speed, the heat generated by the condenser and radiator will combine and rise up to a critical level. So better check carefully the condition and operation of your cooling fans. Check also the fan relays and fuses.
I just hope it's not a module issue, it will need more diagnostics, and very costly ,too.

Jul 12, 2011 | 2003 Chevrolet TrailBlazer

1 Answer

Crownvictorias2006 overheating all the time


Do you think that it's overheating because the temperature light is on? If so, then it's possible that you have a bad temperature sensor and not an overheating engine.
Look for other signs of engine overheating :
1. Sluggish engine operation.
2. Detonation upon acceleration (pinging).
3. Rough, uneven engine idle.
4. Coolant boiling in overflow tank.
If your vehicle is experiencing these symptoms, then overheating is indicated. One of the most common cases of overheating is a bad thermostat. Another common problem is a faulty cooling fan or fan circuit. The cooling fan can be checked by running the engine at operating temperature and turning on the AC control. if the fan does not come on, then a problem with the fan circuit is indicated. The thermostat can be checked by placing a cooking thermometer on the motor near the upper radiator hose where it attaches to the motor. the temperature should not go above 225deg. If it does, then replace the thermostat. If the temperature stays at or below this rating, then replace the temperature sensor. I hope that this information helps you with your problem and thank you for using Fixya.com.

WARNING : Be very careful when working around cooling systems when the engine is at operating temperature. DO NOT open the radiator cap (if equipped) or even the overflow tank cap when the system is hot. Always wear safety glasses. Remember that electric cooling fans can operate at any time, even after the engine is off. Keep hands away from fan when working in the engine compartment.

Jun 01, 2011 | 2006 Ford Crown Victoria

1 Answer

02 sunfire overheating


make sure you have radiator full of coolant
run the car to operating temperature
check the operation of the cooling fan
feel the upper radiator hose and the lower radiator hose. they both should be hot.
if one is cold then you may have a bad thermostat or restricted flow
if cooling fan does not come on when engine is hot then you have bad cooling fan switch, relay or motor.
good luck

Mar 07, 2010 | 2002 Pontiac Sunfire

1 Answer

The engine is overheating at a stop but then goes down when I hit the gas. I have no Heat in the car. The radiator is full of coolant.


You may have one of several issues. Overheating at a stop indicates an inoperative radiator cooling fan, The no heat issue is more than likely being caused by an air pocket left in the cooling system from the overheating. I would suggst verifyuing the operation of the cooling fans, and then check for any air pockets in the cooling system.

Dec 22, 2009 | 1996 Toyota Camry

1 Answer

Overheating


Your overheating problems can have several possible causes.
1) Airlock in heating system - solution - bleed air from cooling system.
2) Radiator blocked - solution - drain and flush radiator
3) Failed waterpump - solution - fit new waterpump
4) Engine thermostat stuck in closed position - solution - fit new thermostat
5) Electric cooling fan (if fitted) failing to operate - solution - check fan, fan operating switch, all wiring and connectors
6) Not enough coolant in system - solution - check and top up to required level. Also check all hoses for sign of leakage.
7) Faulty temperature gauge giving incorrect reading.

Jun 21, 2009 | 2001 Jaguar XJ8

1 Answer

Trailblazer lt 05 overheating


overheating has a few possibilities.
thermostat.
low volume from water pump.
air lock caused by a small leak
cooling fan not coming on. from radiator fan switch or relays.

have the system pressure tested,
check the fan operation,electric or clutch fan.


Feb 02, 2009 | 2005 Chevrolet Trailblazer Ext

2 Answers

Cooling fans dont operate when engine is on


faulty temperature sensor. It's near where the thermostat lives in the motor. In an emergency you can wire the + side of the fan to the accessory panel, just know that the fan will run the entire time the car is on.

Nov 25, 2008 | 1997 Honda Accord

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