Question about 2007 Volkswagen Jetta 2.5 Sedan

4 Answers

My cooling fans are coming on when the engine starts up. When I turn the car off the fans stay running after only a short journey. The temp gauge is going but doesn't move because the fans are alway going. I have checked fuses and replaced burnt out 15amp and replaced the temp sender unit but still no joy. What next?

Posted by on

  • 3 more comments 
  • jo_henny Feb 06, 2010

    Does the thermostat pull in and out like the temp sender unit it looks like it is situated not far from this unit??

  • jo_henny Feb 07, 2010

    Is the relay something I can do myself or do I have to take it to the shop? Can I buy another relay from the parts shop? What does it look like?

  • jo_henny Feb 13, 2010

    Have replaced relay and temp sensor on radiator and still the fans are going this is driving me crazy!!!!

  • jo_henny Feb 13, 2010

    If this is the sensor that is in the radiator I have replaced this as well as the one that sits up be the engine. The fans are still not doing what they are supposed to. This is a VW golf 1.6.

  • jo_henny Feb 13, 2010

    My cooling fans are coming on when I just go a short distance. Then when the car stops they keep running. I have replaced the relay and the sensor in the radiator the temp sender unit by the engine. What else could it be. I have read it could be the ignition switch or should I just take it to the garage????

×

4 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Guru:

    An expert who has written 7 tips or uploaded 3 video tips

  • Volkswagen Master
  • 1,051 Answers

The running fan is perfectly mormal. Most cars have an electric fan that will run for up to several minutes after the vehicle is shut off. It's nothing to worry about.

Posted on Feb 13, 2010

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 10,319 Answers

The fans run off a cooling fan relay. That is why they run all the time. Replace the relay to correct this problem

Posted on Feb 06, 2010

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Genius:

    An expert who has answered 1,000 questions.

  • Master
  • 1,341 Answers

It is the thermosta's job to send the signal to the fan to activate whenever the engine reaches the right temperature.Also whenever you disconnect the connection to the thermostat the fan will run constantly the minute you have the ignition on.So either you have a faulty thermostat or there is no continuity in the wiring to it, that is a fault in the wires.Hope this helps.

Posted on Feb 06, 2010

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 1,874 Answers

Find out the Engine Coolant Temperature (ECT) sensor 2, placed on the left side of the radiator.
Test at component - ECT sensor 2 disconnected from harness.
Sensor terminals 1 & 2 , plug wire colour: yellow & brown (disconnected).
Condition: ECT sensor 2 at +12 Celsius degrees, typical value of electrical resistance = 3600 ohm. At +30 Celsius degrees, typical value of electrical resistance = 1200 ohm.
Test the ECT sensor 2 by a multimeter and replace if necessary!
I guess that the Engine Coolant Temperature (ECT) sensor 2 is out of order. Therefore ECT sensor 2 send to the Engine Control Module (ECM) wrong informations about coolant temperature and ECM starts cooling fans immediately.

Posted on Feb 07, 2010

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

I have a 2002 Lincoln town car and I just put a brand new fan in and its not coming on my car runs hot when I have it in park with the ac on


Did you check the fan relays ? There are two, cooling low relay an cooling fan high relay . The relays are turned on by the vehicles PCM - engine computer , when an input from the coolant temp. sensor indicates a certain temperature ! When you turn on your A/C the cooling fan should turn on an stay on .
Relay Box
Left center of engine compartment
Cooling Fan High Relay
In relay box
Cooling Fan Low Relay
In relay box
Do you know how to test a computer controlled relay ? Go to you tube an search relay testing . Does the temp. gauge work correctly ? I know you probably don't have a factory scan tool , but this is the where I would start , checking temp. sensor input to the PCM . An with a factory scan tool I can do bidirectional testing , see if I could turn the fans on will scan tool .

Mar 17, 2016 | Lincoln Cars & Trucks

1 Answer

Ford Fiesta Zetec 1.4 After switching off the ignition, even after very short journeys the radiator fan motor continues to operate for up to 1 minute, is this normal, it never did it before, your help...


the temp sensor is right at the top of the head,so if the engine gets up to running temp (even though the rad is cool)it thinks it has a hot spot,so the fan comes on for a minute.then as the "hotspot "goes,the fan switches off.its not a problem unless the fan stays on,then change the sensor.

Nov 21, 2010 | Ford Fiesta Cars & Trucks

1 Answer

I have an Audi A4 1.9TDi 2004. I was driving a distance of 25km and the car temp gauge went up twice on the journey and I got message on the dash COOLANT with a pic of a thermometer. I then drove 80km...


Make sure you uhave a good mixture of antifreeze it make the boiling point higher as well as the freeze point lower. Check the fans let it idle turn on the ac and wait and watch.If it gets hot and No fan comes on start there / thermastat The t-start should be open around 160-180 degrees you should notice it get to the threshhold then drop 10 degrees / heads check for water in the oil oil in the water .See if you can get a temp gun if every thing else checks good before you get into the wiring.

Apr 06, 2010 | 2004 Audi A4

2 Answers

My temp gauge is not going and the fans are coming VW golf 2004


Hi, the fans are controlled from the engine ECU. The ECU recieves a signal fron the temperature sender unit which will then switch on the fans. The sender unit also controls the temperature gauge. Have a look at the fuses before you replace the temp sender unit as it might be a blown fuse. Most of the circuits are intergrated and running through different fuses. I hope this helps.

Jan 21, 2010 | 2002 Volkswagen Passat

1 Answer

After about 2 minutes the engine fan comes on , it only reaches half way on the temperature gauge and keeps going on and off throughout the journey . Why does it come on so quickly ???


Just for peace of mind, I would check the relay for the cooling fan and the coolant temperature sensor with a multimeter. The temp sensor is supposed to trip the relay and cause the fan to run and cool the engine when the coolant temp reaches a certain point. If you register your vehicle at autozone.com, you will have access to a free online repair manual for your particular vehicle and will help you in finding components. It is free. Hope this helped.

Jul 16, 2009 | 2004 Ford Focus

2 Answers

I recently bought a second hand grand voyager and occaisionally when the car is started a little symbol on the dash comes on and stays on. when it stays on and i come to the end of my journey, the car...


It means that the pre heat is in operation.It is a system that burns diesel to create heat to warm up engine quicker so that warm air comes into car sooner.The smoke is the exhaust gasses from the system and normally the whistleing and smoke stops when engine reaches running temperature or on short journeys approx 1 minute after engine is turned off
During summer when no heat is required and air con is on cooling it should not light even when starting from cold

hope this helps

May 18, 2009 | 2004 Chrysler Voyager

1 Answer

Electric fan will not turn off.


couple posabilities first run car up to temp then turn off...when fan stays running unplug the coolant temp sensor for the fan< there are 2 other is for comp/gauge> if fan turns off replace sensor if not replace relay for cooling fan

Mar 22, 2009 | 1997 Volkswagen Jetta

1 Answer

Cooling fans will only turn on if engine is off only


Electric cooling fans do not run all the time. They will only come on if the engine exceeds normal operating temp. Also will run when AC is on. Easiest way to make sure they are operating properly is to first verify they run when the AC is on. Next turn the AC off and run the engine at 2500 rpms sitting still and monitor the temp gauge (don't let it get into the red). The fans should come on after 10-20 minutes (depending on outside temp.). As the engine cools down they will turn off.

Jan 04, 2009 | 1995 Honda Accord

Not finding what you are looking for?
2007 Volkswagen Jetta 2.5 Sedan Logo

Related Topics:

229 people viewed this question

Ask a Question

Usually answered in minutes!

Top Volkswagen Experts

Colin Stickland
Colin Stickland

Level 3 Expert

22095 Answers

yadayada
yadayada

Level 3 Expert

75077 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

7768 Answers

Are you a Volkswagen Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...