Question about 2003 Jeep Grand Cherokee

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Fan motor is not coming on for radiator causing overheating. fuse is good. fan moves freely. we turned on the air conditioner and the fan still does not come on.

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Posted on May 01, 2010

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What could cause my 93 Chevy Cavalier to overheat? I just put in a new water pump and a new thermostat but it still tends to overheat and now has a leak from the thermostat intake hose.


We need rule out a few basic things to properly diagnose the overheating problems.
Step 1:Do you think?there is enough antifreeze in the radiator? Don t just look inside the plastic overflow bottle only, you should remove the radiator cap and then look inside the radiator.We should see the fluid level whether it is at its proper level or not. Most cars and trucks will hold a mixture of coolant and water .You should have the cooling system pressure tested for a leak if you have to add more than a pint of fluid .If we see any obvious fluid loss in the engine compartment or on the ground , we should also have the system tested.
Step 2:If you don not see any coolant leak or low fluid level , then you should determine when the overheating problems occurred.If the engine overheats only at a stop or idle ,Most front wheel drive cars will use an electric cooling fan motor located in front or behind the radiator. The existence of function of the cooling fan is to improve airflow across the radiator at stops and low speeds.The fan is controlled by sensors,it regulates the engine temperature and additional load that might be placed on the engine.The cooling fan is required by the air conditioning compressor to operate at idle when the compressor is on.It is a quick way to check the cooling fan operation to turn on the air conditioner.
Also the cooling fan should come on with the air conditioner compressor. Some automobiles will have two electric fans, one is the air conditioner condenser fan and the other is for the radiator .It will have a belt driven fan blade and fan clutch if your vehicle does not have an electric cooling fan on the radiator . This fan should be pulling a large amount of warm and hot air across the radiator onto the engine to keep it cool.The radiator fan is usually closer to the middle of the radiator. The radiator fan is responsible for cooling of the engine, while the condenser fan is responsible for increasing air conditioning efficiency at idle and low speed.If there is ample airflow across the radiator at idle. The radiator is responsible for the primary heat exchange for the engine, and airflow is crucial at this time.
Step 3:Again, we have ample airflow across the radiator, so we must inspect the proper antifreeze circulation.If there is a restriction in the system , it will produce the same affect.Water calcification can accumulate in the radiator and then drastically reduce the flow of coolant at a very high speed. Removing the radiator from the vehicle are the only two real cures for a clogged radiator.It be a waste of time and money trying to correct a restricted radiator when you use a can of radiator flush additive. Of course there are more technical issues that could produce an overheating problems, but the check list described above will identify the most common.Anything you can do to help the mechanic to deal with the problem will probably result in less diagnostic charges, and it might help insure a proper diagnosis of the problem at once of your 1993 Chevrolet Cavalier.
Step 4:You must inspect an electric motor cooling fan ,it will start with ignition key switch off, it has failed and needs to be replaced if the 1993 Chevrolet Cavalier fan motor does not spin freely . The electrical system operates the fan needs to be tested,If the fan motor "freewheels" that . Start the engine and then turn the air conditioner to the coolest setting, if your automobile does not have an air conditioner skip this step.The car air conditioner will operate the 1993 Chevrolet Cavalier cooling fan should activate within five minutes , the fan motor fuse must be checked first and the fuse condition is good the remainder of the electrical system must be checked.
Step 5:A wiring schematic is needed to further troubleshoot this problem ,which is located in a repair service manual. You may use the wiring schematic to trace the circuit through the fuse and relay components, if everything of 1993 Chevrolet Cavalier tests fine, the fan motor has failed and needs to be replaced. The most common repair is the cooling fan motor failure.
This isn't only theory. You can take these steps into practice.You can deal with the 1993 Chevrolet Cavalier overheating problems yourself.

Jul 18, 2016 | Cars & Trucks

3 Answers

Overheating, I have changed the thermostat and it's not the radiator. What else could it be????


Could be trapped air in the engine. Minivans are notorious for this. They way they are constructed, they have water in locations higher than the top of the radiator. This requires them to have bleed ports in certain locations on the coolant system to vent off the trapped air. It could also be a bad water pump, or you could have a blown head gasket. These will also cause overheating.

Apr 11, 2015 | 2002 Dodge Caravan

3 Answers

Car running hot


the water coming out of the front would be from the water pump, it also would be an indication that the pump is bad, which may have been the reason of why the car overheated in the first place.

Dec 19, 2014 | Cars & Trucks

2 Answers

2002 ford windstar sel overheating


first check coolant level in radiator coolant level sound low.if coolant overflow jug empty.coolant sysyem low, when add coolant to coolant overflow jug coolant level should stay at full cold mark.if coolant level okay,engine overheat while sitting or moving in slow traffic either coolant fan relay or fuse could be bad.or engine coolant temperature sensor could be bad. coolant sensor turn on cooling fan at certain temperature.hot wire check to make sure cooling fan motor not bad or short in wires.if all is good have pcm check it controls fan relay to through the coolant temperature sensor signal when coolant get hot.

Nov 04, 2012 | 2002 Ford Windstar

2 Answers

I have a 2000 Dodge Durango 5.2L that recently overheated. I replaced the old radiator (had a crack) with a new 4.7L...she still overheats. I viewed that the cooling fan wasn't spinning...I chec


check for low coolant level make sure coolant system been bleed from air.make radiator full coolant and coolant reservoir on the full cold mark.if all is good the cooling fan relay could be bad or the engine coolant temperature sensor could be faulty.

Sep 18, 2012 | 2000 Dodge Durango

2 Answers

Overheating when is not moving


Well it can be several things start with the basics, check that your antifreeze is full along with your engine oil. Next check that your fan is turning on the radiator. And that there are no obstructions on the face of the radiator like paper or plastic or leaves anything that hinder the flow of air across the radiator. There are several other things that can cause this problem but start with the basics first. After that it might start to cost you money, if the thermostat is stuck closed that can cause you to over heat. If the car ever back fired on you and your timing is off that can cause you to overheat also. And lastly and I hope this isn't wrong but you will have to have a mechanic check it, a blown head gasket can also cause you to overheat and this is a very expensive repair.

I hope this helps you out.

Apr 01, 2011 | 2004 Chrysler Sebring

2 Answers

Overheating


check fluid level in radiator are you leaking fluid on ground does cooling fans come on if they dont check fuse for fans if fuse is good inspect wires going to fans are fan motors bad is water flowing thru engine anfter thermostat opens if notcould be bad water pump is there water on your oil dip stick if so blown head gasket dont keep driveing hot

Nov 29, 2010 | 1995 Land Rover Discovery

1 Answer

Overheating


CHANGE THERMOSTAT AND RADIATOR PRESSURE CAP.CHECK COOLANT LEVEL.MAKE SURE YOU HAVE 50/50 ANTIFREEZE AND WATER.MAKE SURE COOLING FANS COMING ON WHEN ENGINE REACHES 190 DEGREES.TO SEE IF COOLANT FANS RUNNING TURN ON CAR AIR CONDITIONER TO SEE IF FANS RUN IF NOT CHECK COOLING FANS FUSES.IF FUSES GOOD I AM LOOKING AT A FAULTY COOLANT TEMPERATURE SENSOR.IF ALL IS GOOD.NO LEAKS AT RADIATOR HOSES + HEATERS HOSES. NO LEAKS AT WATER PUMP WEEP HOLE OR GASKET.NO LEAKS AT RADIATOR.LAST RESORT CHECK ENGINE OIL. IF LOOKS LIKE MILK SHAKE YOU HAVE LEAKING HEAD GASKET.THAT WILL CAUSE ENGINE OVERHEATING.

Jun 23, 2010 | 2000 Cadillac Seville

2 Answers

I just changed my radiator,thermostate.But it is still overheating.I don't see any smokes,but the gauge for the temperature above normal.What should I do?


The radiator fan may not be blowing.
Idle car with parking brake engaged.
Turn OFF Air Conditioner
Pop open hood and look at the radiator fan.
It is not spinning.
Turn ON Air Conditioner and look at fan.
The fan MUST be spinning.

Replace the "Radiator fan" relay switch.
Check primary fuses and replace as needed.

Nov 09, 2009 | 1998 Subaru Forester

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