Question about 2003 Suzuki Aerio

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Cooling Fans both of the cooling fans stop running what should i be checking and is this an easy fix

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The fans are activated by a sensor normally located on the radiator. These sometimes go bad or the connections need cleaning. Follow the wires from the fans to find the sensor. To check it disconnect the wires and put them together manually. The fans should fire up. If not and you've check the fuse in the fuse box than you need to go deeper. Good luck.

Posted on May 17, 2009

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1 Answer

How do I fix cooling fans that run when car is off


Replace the fan relays. The Radiator Cooling Fan Motor Relay is located: Under hood, driver side, front side of strut tower, mounted in relay panel
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Electric cooling fans not working at any time while vehicle is running causing temp gauge to read high.while vehicle is moving temp gauge will go to normal.as soon as you stop temp gauge begins to...


{: ) You didn't mention the model of your vehicle. Anyway, I admire your way of observation, and I'm sure you got the analogy by now. When the car is running, the engine rpm is higher, and so with the water pump, plus the wind velocity passing thru the radiator fins, can give sufficient engine cooling without the electric cooling fans. But when your vehicle stops, like sitting on a traffic, the engine rpm is lower, and so with the water pump, and there ain't enough wind to help.
This is why the electric cooling fans are very important in maintaining engine temperature at normal levels in any driving conditions.
Basically, the cooling fans are controlled by the engine control module (ECM). The ECM monitors input from various engine sensors and then will give an output signal based on its programmed instructions. The output signals will energize the corresponding fan relays, be it high or low speed.
You can start by checking first the easy ones like the fuses and relays. Cooling fans usually have square top transparent windows. Check the the underhood fuseblock label to locate. Might as well check all fuses to be sure.
Check the cooling fan relays for signs of overheating, and also for loose terminal seating.
Check the cooling fan if stuck, and also check the connectors if burned or melted. To rule out a defective cooling fan motor, you can check for continuity, or you may apply direct voltage to the two wires on each fan.
The mostv frequent cause of cooling fan malfunction is on the fuses, relays, and connectors.

Jul 22, 2011 | Chevrolet SSR Cars & Trucks

1 Answer

I just bought a 1995 jetta and it's running at 260 degrees. Is this too high, and if it is then what would be causing this?


CHECK TO SEE IF BOTH COOLING FANS RUNNING ARE RUNNING WHEN ENGINE RUNNING START OVERHEATING IF COOLING FANS NOT WORKING CHECK COOLING FANS LARGE FUSES IN THE ENGINE COMPARTMENT OR YOU COULD FAULTY COOLING FANS THERMO SWITCH BOTTOM LEFT SIDE OR RADIATOR.IF COOLING FANS IS WORKING WHILE ENGINE RUNNING.RADIATOR CORES AND HEATER CORE COULD BE CLOGGED.COOLANT SYSTEM NEED FLUSHING. THE THERMOSTAT PARTIALLY CLOSED CAUSE ENGINE OVER HEAT.CHECK WATERPUMP WEEP HOLE IF LEAKING WATER PUMP NEED REPLACING.

Jul 21, 2011 | Volkswagen Jetta Cars & Trucks

1 Answer

Cooling fan control when driving on X-way and then exiting to a stop light the temp does not show high but with steam coming out from under the hood it must be hot. The fan(s) never come on. At what point...


you can disconnect the fan(s) and run 12 volts directly to the fans to see if they are working...you need to check the following parts: there should be a fuse panel located inside the engine compartment...check the cooling fan fuses, the cooling fan relay, and possibly the cooling fan sensor located on the engine

Feb 05, 2011 | 2001 Mitsubishi Galant

5 Answers

What would cause my radiator fans not to run


A lot of different things fall into this senario.Low coolant level,air in the cooling system,and a stuck thermostat,or,a bad coolant sensor,or even a bad cooling fan relay,or the cooling fans are bad.Turn the defrost on or the ac,the cooling fans should come on if the fans,and the relay are ok,if so,replace the thermostat,and coolant sensor,and bleed the cooling system of air.

Feb 01, 2010 | 1994 Toyota Camry

1 Answer

Air conditioning works when car first starts up (Volvo s40) then stops cooling after a while (usually when I am stopped in traffic) -- then if I turn it off and back on after a few minutes it works again....


It sounds like your cooling fans are not working.Need to check the cooling fan fuses,and the cooling fan relays.There is also a high side switch mounted somewhere on the high side of the ac system that cuts the fans on,or kicks them up on high speed when the ac system gets to high on the high side of the system.This switch may also cut the compressor off.I would check the fuses and relays for these fans first,this is more likely the problem.Is the car running normal temperature? If not the fans may not be running at all.Have them checked.The fan or fans may be bad them selfs.If I can be any more help,let me know.>>roniecon@gmail.com

Aug 19, 2009 | 2005 Volvo S40

1 Answer

Mercedes benz airconditioning


You might check the cooling fans on the condenser to see if they are running when the ac is on.If they are not check for blown fuse,or bad cooling fan relay.Do you notice if the ac cools better when running constantly,and the ac is not so cool when in traffic,stopping and going,and running slow?If so the cooling fan,or fans are not working.If the fan fuse and the relays check out fine,then replace the fan,or fans.If I can help any more please ask.roniecon@gmail.com

Aug 19, 2009 | 2004 Mercedes-Benz C-Class

1 Answer

Cooling fans do not run normally or in AC mode on 2003 VW GTI VR6


Check cooling fans not faulty - run freely.
Check the operation of the cooling fan control relay.
Replace relay, and observe if this fixes the problem.

Jul 17, 2009 | 2003 Volkswagen GTI

1 Answer

At first the ac stopped cooling. then the car overheated with the ac off. there appears to be no loss of radiator coolant


Turn your engine on with the A/C on high. Watch your cooling fans mounted behind the radiator to make sure they are running. If they're not running, you have something wrong in the electrical side of the fan system. The cooling fans are essential for cooling as they pull air through the radiator when the vehicle is not moving fast enough to cool the coolant. The problem probably lies in a relay, so replace the high speed fan relay with one you know works but is not essential for moment (rear window defrost or something similar) and put that in the relay spot for the high speed fans. If the fans kick on now, you need to replace your relay and this will probably also fix your overheating.

Jul 12, 2009 | 2002 Mazda 626

2 Answers

Car over heating when stopped in traffic but not when movin


Hi. the first test will be to open the hood and inspect the cooling fans. check to see if the fans are activating in intervals during the running cycle. if you don't see any fan rotation at all, this will confirm cooling fan failure and you will need to replace the fans or fan relay. Now, if the fans are running and the car is continuing to run hot when stopped, i would move to the next inspection point. the next problem spot will be a faulty water pump or faulty thermostat


If these two devices are malfunction in any way, it will cause the symptoms you are experiencing. at this point. the first thing is to make sure those fans are actually working.


Please rate and have a great day:)

Apr 28, 2009 | BMW 318 Cars & Trucks

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