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The radiator fan running slowly - Grand Cherokee Jeep Cars & Trucks

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This is a variable fan that changes speed with engine conditions. Some actually don't operate at all when the engine is cool. Older fans ran continuously and wasted engine power.

Posted on Jun 01, 2009

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My AC does not blow cold air and at idle the engine gets hot with AC on. The radiator fan appears to be running but very slowly. Where can I start to troubleshoot?


If AC doesn't cool, the freon may have leaked out. Radiator fan is a different issue, how hot does the engine get?

Jun 22, 2015 | 2011 Kia Sorento 3.5

1 Answer

Why my mazda mvp 2003 over heats before one mile


Check as soon as you come to overheating position whether at that time the fan is blowing. If not check for the fan switch,if is working or not.If the fan is blowing then switch the engine off and with the fan not in operation try slowly and carefully not to burn your hands touch the radiator ventilating core surface to all sides on the radiator whether are all on the same temperature feeling. If not means that the radiator is blogged or the thermostat is blogged.If is everything in working order,let the radiator to cool down and slowly and carefully remove the radiator cap or the radiator expansion tank cap and start the engine in idle and follow the water if is rotating. If not you have to check for your water pump if is working might have worn blades. Another possibility is the radiator or expansion tank cap faulty.

Hope this helps.
Good Luck.

Aug 28, 2014 | 2003 Mazda MPV

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The Tempertuer get hight when i drive slowly


When moving slowly, there is not much air flow through the radiator, an electric fan should switch on and draw air through the radiator when the car is moving slow. Check the fan is working, could be the fan switch that is not working, to prove the switch bridge the wires on the switch and see if the fan comes on, (Ignition on). Check for a live feed at the fan, check the fuse.

Jan 25, 2014 | Cars & Trucks

2 Answers

Temperature hand keeps moving up


when the engine is completely cool. first thing you need to do is check your coolant level. if it is full. then either your thermostat is bad, your cooling fans aren't working, radiator is plugged or heater core is plugged. but if the heat works and blows good and hot odds are nothing is plugged and its the cooling fans that aren't working. Worst case could be a bad head gasket

Mar 23, 2013 | 2004 Pontiac Grand Am

1 Answer

Big white fan connected or near radiator not working causing my temperature guage to slowly rise while im driving the car. i then switch my air-con on while driving slowly temperature goes down


That's the radiator fan malfunctioning. Check the fan motor itself by conecting direct to battery while disconected from harness. If not OK replace. If OK check the fan switches, These are sensors that turn the fan on when temperature rises. If bad replace.

Oct 05, 2012 | Cars & Trucks

3 Answers

My 2001 lincoln ls slowly moves to overheating when it is running it doesnt jump but it overheats need to know why


These cars have a hydraulic cooling fan, and they can go bad.
The usual potential cooling problems apply, and the crazy hydralic drive just makes it more complicated. An electric fan is good or bad, but a hydralic fan can slowly loose the ability to spin fast enought to get the job done

Aug 25, 2010 | Lincoln LS Cars & Trucks

2 Answers

2003 Protege 5 overheating on long runs (> 20 min). Overheated today while driving at interstate speeds for > 15 min. Lost the coolant. Refilled with coolant. Return drive maintained normal engine...


Sounds like you have coolant leak if you are loosing coolant or a bad thermostat. I would replace the thermostat, they run about $10. The other fan is an aux fan and will only run when the a/c unit is on.

Mar 01, 2010 | 2003 Mazda Protege

1 Answer

I have a 1993 BMW 325i, I am having cooling in which the car overheats profusely when running for a little while. I just replaced the thermostat and I am getting ready to go check the waterpump to see if...


U may have a faulty fan clutch,If the fan is turning very slowly while the engine is running its faulty.Also you may have a restriction in the radiator,one way to check the radiator is to remove the hoses and flush water through it to see if it flows straight through.A common issue is the fan clutch be sure to check it first.

Feb 03, 2010 | 1993 BMW 3 Series

1 Answer

Why does my 1992 toyota camry run hot and radiator fan runs slowly


I would strongly suggest you replace the fan as its probably worn out and this is why its spinning slowly,thus why your car is getting hot,its fairly common for electric fans to slow down with age.You need to be careful that you dont drive the car till you fix it as you could overheat it and blow a head gasket!!

Nov 15, 2009 | 1992 Toyota Camry V6

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