Question about 2005 Volkswagen Jetta

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I have a 2005 Jetta 2.5 and it seems like one fan runs to fast

I have a 2005 Jetta 2.5 and it seems like one fan is running to fast and one fan is not running at all, engine cooling fan that is. Just wondering if someone might know whats up. It seems like one fan is getting the power for both fans. Also my book doesn't tell me which relay works the fans.

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One fan should run when engine is running. Other fan should run when AC is on.

Posted on Jul 07, 2009

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2005 volkswagon jetta cooling fan wont turn off


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You are talking about the thermo electric cooling fan, its operation is independent of the car's electical system. It is switched on and off by the engine temperature. When you park, the engine heat soaks upward to heat the thermostat turning the fan on. It will run until the engine cools down and the thermostat switches it off. Quite normal operation.

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Hi,

Fan Relay switch is stuck open. This of course assumes your temperature sensor is working appropriately. Which I assumed since you seem to know that the engine is running hot.

Replace the fan relay switch. The relay switch is tripped when the temperature sensor tells the computer the engine is too hot.

Until you get the relay switch replaced, you can either by-pass the relay switch and directly connect the fans to the battery, or turn on your A/C ALL the time and use it at a minimum setting. This will keep the cooling fans running at all times.

Hope i helped you.

Thanks for using ' Fixya ' and have a nice day!!

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When A/C is on, both fans should be on all the time. If one is not, probably a dead fan. Replace said fan.

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If you have removed the blower motor, Connect it to a 12 volt power supply(your battery)with some jumper wires.It should turn fast, be careful when you connect it, have a good grip on it, it will jump just a little. If it dont run fast its junk. The other 2 things
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thermostat replace temp sensor its cheap i hope your water pump is not bad you could mess engine up if you keep on running car and is overheating.

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