Question about 2002 Pontiac Aztek

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2002 Aztec Cooling Fans not working possible problem besides rela

I need to knwo if the thermostat couuld be the cause or if it could be the relay or if there is also a fuse somewhere by chance

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There is a relay you will find if you trace the fan wires. It is most likely the relay has gone bad.

Posted on Jul 03, 2009


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Cooling fans dont come on when car gets hot

Have you checked the fan relays ?

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2002 kia sad on a keeps overheating and already replaced thermostat

Many things besides a defective thermostat can cause engines to overheat. Among them are , low coolant, defective cooling fans or cooling fan circuit faults, and also internal engine issues such as blown head gaskets or cracked cylinder head.Water pump could also be a fault but less likely than other issues.
Anything that is related to the cooling system can be at fault.
You may want to have it diagnosed by a professional.

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2002 jeep sport. Overheating while at idle. Changed radiator, thermostat, water pump. Only runs cool when ac is on. What next?

relay that controls the speed of the radiator cooling fans must be checked
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Could a faulty IAT sensor on a Honda Accord LX 1997 cause over-hearting?

A faulty Intake Air Temperature sensor would not cause overheating. Have your cooling fans, fan relay, thermostat, and cooling fan switch checked. These are possible causes and are known to cause this problem on these models.

Aug 31, 2011 | 1997 Honda Accord

1 Answer


There are a few things you need to check:
First, make sure the cooling system is free of air. This can be done by loosening the bleeder screw while the engine warms up and closing it when only coolant spills out.
Also, look for any leaks from the radiator. Keep in mind it could be leaking internally.
Make sure the cooling fans are working. Check the fuses and switch the cooling/radiator fan relay with a nearby relay like the A/C compressor relay or another relay you know to be working. If the cooling fans aren't engaging, there may be a wiring issue or they may need to be replaced.

Sep 07, 2010 | 2002 Jeep Liberty

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

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Radiator cooling fans do not come on

Dont listen to the first guys response. The thermostat simply opens and closes with heat to allow the coolant to flow faster or slower through the engine block. What controls the fan is the coolant temp sensor. At a certain temperature it sends a signal to the fan relay to switch on and that in turn sends the power to the fans. If either of those are bad the fans wont work.

Aug 14, 2009 | 1996 Chrysler Town & Country

1 Answer

Running hot

Sounds like Clutch in your fan

The coolant level is right on, no hoses are leaking and the accessory belt is intact. You start the engine, let it idle and make a visual inspection. There's no sign of belt slippage.
If your car is like most, the cooling fan is mounted to its drive pulley via a clutch. Clutch fans operate at different speeds under different conditions to help reduce drain on the engine and to save fuel. When the engine is hot, the clutch fan runs nearly as fast as the engine. When the engine is cold, the fan runs much more slowly.
The fan clutch operation is regulated by a valve that is opened and closed by a thermostatic spring. The valve controls the flow of a viscous silicone fluid between chambers in the clutch assembly. When the engine is cold, the clutch is essentially disengaged, which is why the fan runs at its slowest compared to the engine's speed. As the engine warms up, the air flowing to the fan assembly becomes hotter. The hotter air causes the thermostatic spring to unwind and open the valve. Silicone fluid from the reservoir chamber flows into the main chamber, engaging the clutch, and the fan spins faster (though it's still slightly slower than the engine.

Hope this helps!

Nov 30, 2008 | 2002 Pontiac Aztek

1 Answer

Running hot

replace the therostat ( most likely )

and the radiator cap

Nov 29, 2008 | 2002 Pontiac Aztek

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