Cooling fan failure


Asked by Jul 16, 2016 at 11:41 PM about the 2009 Volkswagen Jetta S

Question type: Maintenance & Repair

Have 09 Jetta 2.5. Parked the car last night, didn't
leave anything running that could drain the battery.
This morning tried to start the car; nothing. Battery
was stone dead. Didn't crank. Tow truck came with
the battery boost jump machine thing and it started
instantly with the turn of a key as well as the cooling
fans. Drove to work, removed the key and the
cooling fans continued to stay on. Got out of work
after a 5 hour shift and the battery was dead. Had a
co worker try to jump my car with cables. As soon
as the cables made contact with the terminals the
fans came to life with no key inserted. Jump didn't
work so called the tow truck again and repeated the
process and the car came to life. Had alternator
tested and its functioning correctly but the battery
is dead now. Any input on what is happening with
the fans?

9 Answers


Are you talking about the radiator fan


Because if when trying to jump your car the fans automatically turn on, something but I don't know what at this moment is keeping your fan running constantly so it's running your battery down


Stuck radiator fan relay,if fans continue to run.

Best Answer

Yes I'm referring to the radiator fans. T_S_T, is a stuck relay I can myself make in stuck with limited knowledge and tools?

1 out of 1 people think this is helpful.

Beat thing to do shaun ,is remove the relay if fan is running when you cut the car off,this will answer the question,and yes it is as easy as removing a fuse.


Ment best.


T_S_T, thank you for your knowledgable input; it is greatly appreciated. Could I possibly trouble you for a diagram or a description of where the relay is located and instructions to do so?


And do you mean remove the relay each time after the car is cut off? Or remove it and keep it removed until I can get a new relay?


Okay, had the mechanic take a look at it. In my case, it is the fan control module, which is located on the back of the fan. Hope anyone who has this problem is helped by this!

Your Answer

Add photo

Related Questions

  • 2007 auxiliary cooling fan not working 4 answers

    Just picked up my Jetta from the dealership due to a power wire malfunction on the ECU ($564 repair). Upon pickup the mechanic said the auxiliary fan is not working and main fan is running slow. Nev...

    2007 Volkswagen Jetta 2.5L


    Maintenance & Repair

  • Re: Engine cooling fan won't turn off, even when engine is turned off 35 answers

    I was wondering if anyone knows why the engine cooling fan does not go off when you turn engine off. We had to pull the fuse that is under hood on top of battery. Once we pulled it, it went off, but w...

    1999 Volkswagen Jetta TDi Turbodiesel


    Maintenance & Repair

  • 1995 VW Jetta Radiator Fan Diagnosis? 1 answer

    At normal operating temp the radiator cooling fan does not work. Checked fuses, fusible link, and motor/thermostatic switch for security and cleanliness. How would I jumper the thermostatic plug (wh...

    1995 Volkswagen Jetta Celebration


    Maintenance & Repair

  • Electrical failure 1 answer

    Can a burned out daytime running light on a 2011 volkswagen jetta cause electrical and power shutdown and the epc light to come on?

    2011 Volkswagen Jetta S


    Maintenance & Repair

  • ignition switch failure 5 answers

    2002 Eurovan MV. Our ignition switch has failed and our mechanic says the only solution is to order a new switch from Germany that will be programmed to work with our anti-theft system. $600 and co...

    2002 Volkswagen EuroVan 3 Dr MV Passenger Van


    Maintenance & Repair


Looking for a Used Jetta in your area?

CarGurus has 32,274 nationwide Jetta listings starting at $1,200.


Search Volkswagen Jetta Questions

Volkswagen Jetta Experts

#1 FordNut
Reputation 2,110
#2 Goodwrench707
Reputation 1,880
#3 Tom Demyan
Tom Demyan
Reputation 1,270
View All

Related Models For Sale

Used Volkswagen Passat"
268 Great Deals out of 22,423 listings starting at $1,299
Used Honda Civic"
1,147 Great Deals out of 59,092 listings starting at $995
Used Volkswagen GTI"
120 Great Deals out of 6,235 listings starting at $2,900
Used Volkswagen Golf"
38 Great Deals out of 2,708 listings starting at $1,995
Used Honda Accord"
1,265 Great Deals out of 78,694 listings starting at $1,400
Used Toyota Corolla"
1,416 Great Deals out of 67,100 listings starting at $1,295
Used BMW 3 Series"
1,606 Great Deals out of 39,620 listings starting at $888
Used Audi A4"
316 Great Deals out of 13,019 listings starting at $1,500
Used Toyota Camry"
1,604 Great Deals out of 98,372 listings starting at $895
Used Volkswagen Jetta SportWagen"
20 Great Deals out of 442 listings starting at $4,500
Used Nissan Altima"
1,357 Great Deals out of 87,467 listings starting at $1,095
Used Volkswagen Beetle"
239 Great Deals out of 9,132 listings starting at $999
Used Mazda MAZDA3"
459 Great Deals out of 24,652 listings starting at $1,981
Used Volkswagen CC"
108 Great Deals out of 3,658 listings starting at $4,800
Used Ford Focus"
1,234 Great Deals out of 56,706 listings starting at $1,495

Used Cars For Sale

2017 Volkswagen Jetta S For Sale
4,519 listings starting at $13,012
2015 Volkswagen Jetta S For Sale
10 Great Deals out of 540 listings starting at $8,037
2014 Volkswagen Jetta S For Sale
45 Great Deals out of 822 listings starting at $5,977
2013 Volkswagen Jetta S For Sale
35 Great Deals out of 705 listings starting at $7,881