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Ask sprinkles08 Your Own Question
sprinkles08
sprinkles08, ASE Certified Technician
Category: UK Car
Satisfied Customers: 21795
Experience:  ASE Master and Advanced level certified. Factory trained with 15 years dealership experience
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I have problem with my 2008 jetta5 the big fan start after

Customer Question

Hi
JA: Hi. How can we be of help?
Customer: I have problem with my 2008 jetta5 the big fan start after few seconds ignition stared and stay on till you switch off ignition
JA: Will the headlights turn on? Is the battery fully charged?
Customer: yes
JA: What is the model of your '08 VW?
Customer: yes
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: I have change coolant sensor
JA: Anything else you think the mechanic should know?
Customer: i have change temp sensor and ambient temp sensor, I have notice that in the morning when starting the rev count does not goes above 1000rpm
Submitted: 5 months ago.
Category: UK Car
Customer: replied 5 months ago.
are you still in touch?
Customer: replied 5 months ago.
hello
Expert:  sprinkles08 replied 5 months ago.

Hello and welcome to JustAnswer!

It sounds as if your cooling fan is running when you don't believe it should. It shouldn't be running at all times with the key on but if it's only running when the engine is running then it may just be due to the a/c compressor running. The fan needs to run at stops or low speeds to pull air through the a/c condenser.

Does the fan only run when the engine is running?

Customer: replied 5 months ago.
Good day
When I start the car the big fan runs after few seconds at high speed and small fan does not run at all up until I switch the engine off and big fan runs few minutes before it stops. car 2008 jetta comfortline
Expert:  sprinkles08 replied 5 months ago.
Have you tried both with and without the a/c on?

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