Why is the radiator fan not working on a Volkswagen Jetta?
If your Jetta has a bad engine temp sensor the radiator fan won’t know to come on, because the ECU won’t know how hot the engine is. You’ll need to locate and test the engine temp sensor. Depending on the model year and engine, the location varies.
Why is the fan not working on my VW Polo?
Water was Boiling like a kettle would from the Topup tank thing . so naturally i poo’d myself and drove home , i have checked all the fuses they are all sweet , i have checked the wires that lead directly into the fan via one of those Clips , what could it be ? fan broke ? radiator broke? Temp sensor not telling fan to come on ?
Why does VW use ground wire for radiator fan?
VW added a ground wire to the fan, why because the fan is mounted to a shroud, that is bolted to plastic radiator tanks. These plastic tanks are an insulator, and will not conduct ground. The above is a/c equipped cars, the radiator fan switch also acted as the “After Run” fan switch Simple is more better.
What does it mean when your radiator fan is not working?
This is what we call a blown fuse. A blown fuse is no big deal, and changing one does not cost a lot of money. If your car’s radiator fan is non-functional, check your car’s user manual and locate the fuse for the radiator fan controller or the fan.
Why does the engine cooling fan not turn off?
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 when we put it back in the fan started up again. Any and all replies would be greatly appreciated. 50 people found this helpful.
Where can I buy a fan switch for a Volkswagen Jetta?
The fan switch can be purchased at most auto parts stores. I found the above fan switch at autozone, and was listed for $12.99. The fan control module I found on eBay, but you can shop around. 11 people found this helpful. Don’t go by part numbers you see in pictures, as they vary by manufacturer.
What to do if your radiator fan is not working?
The first thing that you would want to do is locate the fuse for your Jetta’s radiator fan and make sure that it hasn’t blown. If it is blown, replacing the fuse will only solve the problem for a very limited period of time. Unless the wiring issue is fixed, the fuse will blow again.
Is the fan relay on a VW Jetta?
See the link: http://www.ifixit.com/Answers/View/88436/were+is+the+fan+relay+on+a+2000+vw+jetta 129 people found this helpful. The module is quite expensive, but I found them cheaper on eBay.
Why does my radiator fan keep running after I Turn Off the car?
Runs for about 30 minutes or till battery is dead. I have a 2007 VW Jetta 2.5 L – radiator fan stays on constantly, even after shutting the car off. Have to disconnect the battery, because there is not a fuse / relay anywhere under the hood or within the inside car panel.
Where do I find the cooling fan on my car?
Look for this under the hood, near the cooling fan (see the link). Tap on it with a screwdriver handle, and see if the fan shuts off. http://d3nevzfk7ii3be.cloudfront.net/igi/XbD1JcNwbHgRnN4b.standard 106 people found this helpful.
When does a radiator fan turn on and off?
Time Frame. Temperature will often determine the time that a radiator fan starts up. A temperature-sensitive switch functions to turn the fan on and off periodically. Radiator fans are designed to start when the temperature of the engine coolant reaches around 200 degrees Fahrenheit.
Can a broken radiator fan keep your car cool?
A radiator fan has an important role of keeping a vehicle’s engine cool. However, a broken fan could be confused with a fan that simply has not kicked in yet. This is one reason why information on when a radiator fan is suppose to start can be beneficial to vehicle owners. Temperature will often determine the time that a radiator fan starts up.
Why is my radiator fan stuck on very hot?
For fast speed the key must be on, and the FCM must function. It surely sounds to me as if the radiator thermoswitch is stuck in “very hot” or there is a wiring issue between the radiator thermoswitch, or the FCM high speed fan relay is stuck on.
Why does the radiator fan not come on when the AC is on?
In order for the AC Condensor to do its job it must stay as cool as it can. As for the engine coolant temp sensor, if the coolant is not hot enough to make the fan come on, then there is no need for the fan yet and there is no problem.
Why does a VW use a single speed fan?
VW originally used a single speed fan, that was simply controlled by a switch in the radiator. They applied 12V+ from the battery to one side of the switch, and the other went up to the fan. Since current needs a path from ground to a source. VW added a ground wire to the fan, why because the fan is mounted to a shroud,
Where is the fuse box located on a Volkswagen Jetta?
Year of production: 2003, 2004, 2005, 2006, 2007, 2008, 2009 Engine compartment fuse box Relay carrier on onboard supply control unit (left under dash panel) The instrument panel fuse panel Additional relay carrier, under box in engine compartment
What is the rating of a Jetta fuse?
The lists below indicate which device each fuse protects, the amperage needed, and the color corresponding to each amperage rating: Comfort System, Cruise Control, Climatronic, A/C, Heated Seat Control Modules: 7.5A
Why is my a / C not working on my Jetta?
This includes 98-10 Beetle, 99-06Golf, 99-05 GTI/GLI/Jetta/Bora. The fuse as shown in the picture normally does NOT fail but the fuse box under it does. It melts and this particular part sends power to the cooling fan thermal switch AND the Fan control module. The fan module also sends power to the a/c compressor.
What is the relay code for a VW Jetta?
Relay code number 100 is replaced by relay code number 370 depending on production. N… – Ignition coils 1-4 with output stage (up to May 2005) N… – Ignition coils 1-4 with output stage (up to May 2005) N… – Injectors cylinders 1-4 (up to May 2005) N… – Injectors (up to May 2005)
Why are the Bentley radiator fans not working?
I checked the fan circuits as per the Bentley manual today, When I jumper the terminals at the thermo switch on the radiator the fans come on, but only high speed. They won’t work on low speed. I turned the AC on with the fans on hoping it would be cool but it still won’t cool.
What happens if you overheat a VW Jetta?
Overheating can cause a lot of expensive damage to the engine. A blow head gasket or a cracked head/block are much more expensive to repair than a thermostat or water pump. Your Jetta’s cooling system works by cycling the engine coolant from the engine through the radiator. The water pump pushes the water through the entire system.
How does the cooling system work on a VW Jetta?
Your Jetta’s cooling system works by cycling the engine coolant from the engine through the radiator. The water pump pushes the water through the entire system. The thermostat opens up once the engine reaches operating temperature and allows coolant in. If any part of this system fails, your Jetta will eventually overheat.
Is it normal for a car cooling fan to run constantly?
Both cooling fans run constantly. The AC is off. Engine cold, start up, and they both run continuously. Key off, and they both stop. Not sure about the different speeds, but I venture to say it is high speed. I suspect this is not normal. However, the AC does work good!
Why does my car fan not shut off after heavy rain?
After heavy rain, one of the two fans ( transmission cooling fan) will not shut off. I have to disco.the battery every time I park to keep from draining it. Fan assembly replaced.
What kind of engine does a VW Jetta have?
A second injector nozzle option, the popular PP764 nozzle, also offers a path to 180whp or more. Found on the 150hp European version of the 1.9L engine, the Garrett VNT-17 has long been a popular turbo upgrade for state-side Jetta TDI’s.
Is the VW Jetta bv39b twice the power?
In conjunction with DLC 1019 nozzles and custom tuning, we’ve seen the BV39B support twice the factory torque rating and a 75-percent increase in horsepower without sacrificing any drivability, fuel economy or engine longevity (the car is still running the exact same, six years after the build).
What are the fuses on a Volkswagen Golf?
Instrument Panel Fuse Block № Function/component 1 Z4 – Driver side heated exterior mirror 2 E3 – Hazard warning light switch J1 – Tu 3 J5 – Fog light relay E20 – Switches and 4 X – Number plate lights
What kind of washer does a Volkswagen Golf have?
J31 – Automatic intermittent wash and wipe relay, without headlight washer system (377), -with headlight washer system (389), -with rain sensor (192) WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.
When did the fifth generation Volkswagen Golf come out?
In this article, we consider the fifth-generation Volkswagen Golf (MK5/A5/1K), produced from 2003 to 2009. Here you will find fuse box diagrams of Volkswagen Golf V 2004, 2005, 2006, 2007, 2008 and 2009, get information about the location of the fuse panels inside the car, and learn about the assignment of each fuse (fuse layout) and relay.
Where is the fuse box on a Volkswagen Touran?
Fuse box on left in engine compartment Volkswagen Touran. type 2. (5A) Brake pedal position (BPP)switch, clutch pedal position (CPP)sensor (10A) Engine coolant blower motor control module, engine coolant pump relay (some models), engine coolant thermostat, engine management (40A) Multifunction control module 1, multifunction control modulerelay2
Can a 3 wire radiator fan run when unplugged?
Use the one for the older cars. Your car is old enough to use a F129, four wire double switch, not the 3 wire G65. It should not run when unplugged. You can safely short (jumper pin to pin on the connector) a 4 wire switch for testing.
What happens to the fans when the engine gets too hot?
Both fans always work in tandem. The resistor pack inside the fans will burn out and the fans will stop working on low speed but will still work on high speed when the engine gets too warm. The a/c button turns the fans on LOW only, and the fans will still work on high if the engine temperature gets too hot, above 107C actually, or 224F.
What are the symptoms of a bad thermo coolant fan switch?
Several symptoms may point to a bad or failing thermo coolant fan switch. 1. Engine overheating Engines generate an enormous amount of heat and as a result are subjected to very large temperature swings if this switch does not operate effectively.
What to do if your a / C fan is not working?
The a/c button turns the fans on LOW only, and the fans will still work on high if the engine temperature gets too hot, above 107C actually, or 224F. The only way to fix this is to replace the defective fan.
How long does a VW cooling fan last?
The thought of walking away from your Volkswagen with the cooling fans buzzing away leaves most people with images in their heads of dead batteries and tow trucks. Rest assured—this is in fact normal operation. The after-running of the cooling fans is deliberate and can sometimes last up to 16 minutes after switching the engine off.
Why are the cooling fans not working on my car?
1. Engine running hot 2. Cooling fans do not function 3. Cooling fans stay on at all times Average rating from 129,472 customers who received a Vehicle Engine Cooling Inspection. Most modern vehicles use electric cooling fans to help pull air through the radiator so that it can keep the engine cool.
Why does my TDI cooling fan run after shutting the engine off?
Since the vehicle does not know you are only going on a short trip, it may start this process just before you arrive at your destination and now that engine is switched off and the vehicle is stationary the system will self-activate the cooling fans at high speed in an attempt to bring down those high temperatures now trapped below the hood.
Why is the engine fan still running in a 2009 TDI?
Everyone with a 2009+ TDI has experienced this same thing. It is perfectly normal. The regeneration cycle for the DPF is burning off accumulated soot. This generates a lot of heat and the fans running prevents all the plastic bits under the hood from melting. It’s nothing to worry about.
Is it normal to have the engine fan running after you turn off the engine?
I don’t think it applies to the OP, but most modern cars may keep the fan running after you shut down for a while as it cools the engine. It happens with many, but not all cars. VW really needs to put a label under the hood saying that the fans running after engine is turned off is NORMAL.
Why does my Audi A3 fan run all the time?
That 4-pin refrigerant pressure switch was a common failure on the A3 cars, and its failure mode would cause the fan to run constantly. Never seen it manifest itself in the same manner on an early A4 car, though, but that doesn’t mean it couldn’t happen.
Why are the fans on my car not working?
It melts and this particular part sends power to the cooling fan thermal switch AND the Fan control module. The fan module also sends power to the a/c compressor. So pretty much the fans don’t work and your a/c blows warm. Check this first before checking other areas.
Why is my VW Jetta TDI not working?
I have a jetta 2013 highline TDI which have the same trouble with power sockets. The whole idea of german engineering reliability is a myth. The car is having poor upholsery, things started peeling off in the third year itself. After a year the doors wont lock.
Why is the DC connector on my VW not working?
This is because the vehicle is under constant development, because fuses are assigned differently depending on the equipment level and because several consumers may use a single fuse. You can get more information about the fuse layout from a Volkswagen dealership. Click to expand… I’ve been to my dealer and they give you nothing.
Where is the fan control module on a VW?
The fan control module is located under the radiator and has two connectors: a 14-pin (T14) and a 4-pin (T4). 2. Check for 12 volts to pin T4a/1 (red/black) and T4a/3 (red) via fuses S164 and S180 respectively, in the fuse box on top of the battery, at all times.
What to do if your radiator cooling fan Wont Stop Running?
Remove the lid. Look on the inside of the lid and for the mapping of the fuses and relays with their location. Pull the cooling fan relay out of the box. Replace the cooling fan relay with a new one. A stuck closed relay is the only thing that can operate the cooling fan continuously with the key off.
When does the engine cooling fan turn off?
If the fan switches off by itself after about 10 minutes, it is working properly. MK4 (1999-2004.5) VWs have an after run feature to cool the engine after shut down if the coolant temperature is too high. 35 people found this helpful. You have been quite helpful… and I thank you for the time you spent in answering my question…
Why is my computer cooling fan not working?
A stuck closed relay is the only thing that can operate the cooling fan continuously with the key off. The computer looses power with the key off and the same applies to the coolant temperature sensor. The relay, however, has direct power to one side, the same as a light switch.
When does the thermo coolant fan switch shut off?
As engine temperature rises to a specific threshold, the switch is activated powering on the coolant fan. The coolant fan will continue to run until the engine temperature cools down to a specific predetermined level. Once the temperature reaches this cooling stage, the coolant fan will shut off.
What are the symptoms of a bad coolant fan switch?
A common sign of a faulty switch, which can also be alarming, is that the switch will simply not turn the fans on at the predetermined temperature level resulting in engine heat climbing above what it should be in order to run effectively.
How can I tell if my Chevy Aveo radiator fan is bad?
You can test the voltage going from the fan relay to the fan itself. If it is getting 12+ volts, the fan should be coming on. But if it’s not, which means the fan has gone bad. This video from Ratchets and Wrenches is a phenomenal resource on how to properly diagnose a wiring problem.
What kind of cooling system does a Volkswagen Jetta have?
Volkswagen Jetta 1.8L / 1.9L / 2.0L 2003, Dual Radiator and Condenser Fan Assembly by Pacific Best®. Increase the life of your vehicle’s engine by keeping your cooling system in top condition.