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Which fan motor cools the engine and which one is for air conditioner

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Both are for the engine's radiator and for the a/c even if off to the side.

Posted on Jul 20, 2010

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Posted on Jan 02, 2017

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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

2 Answers

2004 chevy Impala my heater and my air conditioner wont blow air


start with using a meter to test for power start from fan back to switches need to check harness and connectors

Nov 02, 2017 | 2004 Chevrolet Impala

1 Answer

Air conditioner works fine while driving. When stopped for a light, temperature gage goes up and fan blows hot air.


Hello: Check the radiator cooling fan. With engine running and A/C on open hood look down on the back-side of the grill, that's where the cooling fan is. It should be running, if not check the fuses, cooling fan relays/module if they are ok then you may have a cooling fan motor failure. You can use jumper cables to hot wire the fan motor to see if it runs.

Sep 14, 2011 | 2002 Saturn Sl

1 Answer

Rise in temperature when you run the air conditioner


See if it has two radiator cooling fans. A lot of vehicles do have two and usually one is temperature controlled and the other comes on when the a/c is turned on for additional cooling because the a/c will cause the cooling system to warm up due to additional load being put on the engine. If this is the case, check your fuses and relays and see if you are gatting power to the fan motor. You may possibly have a bad fan motor.

Sep 12, 2011 | BMW X7 Series Cars & Trucks

2 Answers

I jus brought and 1995 nissan altima. One of the radiator fans does work and I was wondeing if that could make the car shake? It only shakes midly but when i turn on the ac it shakes bad.


If the air conditioner is overcharged it can cause this to happen. Also that fan will need
to be replaced because it helps the condenser for the air conditioner to cool the air.
someone may have overcharged the a/c to try and compensate for it.
The lack of cooling will cause overheating of the engine without that fan replaced because it is also the radiator fan.
Hope this is useful.

Jul 23, 2011 | 1995 Nissan Altima

3 Answers

Air conditioner fan runs all the time. Turn on key the fan starts. Car is not hot, has been sitting overnight Question how to turn off so it only works with the AC


I would suspect a stuck cooling fan relay. Your going to have to locate the malfunction to get the operation that you seek. Reference owners manual for lcoation of the cooling fan relay and try switching it out.

Feb 18, 2011 | 1998 Chevrolet Tracker

3 Answers

Cannot get cooling fans to turn on for radiator???


The cooling fans won't run until either the engine coolant temperature reaches about 218 degrees or the air conditioner/defroster are on. Once the engine reaches appx 218 degrees the fan will come on and run until the coolant temperature drops a few degrees and will then turn back off. If either the a/c or defrost are turned on then the cooling fan will begin to run to remove the heat from the a/c system and should stay on until either is turned off. If the engine is overheating in slow or stop and go traffic then the fan may not be working at all due to a bad fan motor or blown fuse.

Nov 12, 2010 | 1997 Chevrolet Lumina

2 Answers

How do i change the starter on a 96 century


If it's the 3.1 or the newer 3100 the starter should just be a couple 13 and 15mm bolts. Plus the nut for the cable. Hope this helps.

Jul 13, 2009 | 1996 Buick Century

1 Answer

I HAVE A 91 HONDA ACCORD WHICH HAS TWO ELEC FANS


Both fans cool the motor. If you have the air conditioner on both fans will run because the cars cooling system will have to disapate more heat. If you have the air conditioner off only one fan will run because the heat load on the engine isn't as great.

Jan 01, 2009 | 1991 Honda Accord

2 Answers

CHECK ENGINE LIGHT ON, AUTO ZONE SAYS COOLING FAN SHORTAGE


If the fuse is blowing there is too much resistance in the cooling fan moter. Replace JUST the cooling fan motor and the fuse. The A/C always turns the cooling fan ON when turned on. That is why the A/C messes up when the fan motor is bad. Replace the fan motor and the A/C problem will be fixed too. :)

Aug 07, 2008 | 2004 Chevrolet Cavalier

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