Why does my Jetta not have a cooling fan?
Simply the engine is not hot enough to turn on the cooling fan, its not hot enough outside, you are driving getting plenty of air flow through the grille to keep things cool without the assistance of the fan. Its possible that you have no problem at all. Was this answer helpful? I got a 2002 Jetta the cooling fans don’t turn on .
When do you turn on the cooling fan in your car?
Most cars will switch the cooling fan when the coolant temperature reaches 85 degrees Celsius (185 degrees Fahrenheit). That is considering having the air conditioner on.
Why are my coolant fans not turning on?
If both fans operate then it is time to take a look at the pressure transducer. Don’t let this strange name fool you, it is simply a sensor that relays the amount of pressure in the system to the PCM and the PCM decides when to turn on the fans and or compressor clutch.
What causes a car fan to run all the time?
If the relay shorts internally, it may cause power to be permanently switched on, which will cause the fans to run at all times. Depending on the wiring setup of the vehicle, this may cause them to stay on even when the vehicle is off, which will drain the battery.
Why are the fans on high when the engine is running?
Unplug the coolant temperature sensor while the engine is running. This should cause the fans to turn on low then kick to high, IIRC. Typically when the engine computer loses the signal from the coolant temp sensor, it just turns both fans on high so the engine will not overheat.
Simply the engine is not hot enough to turn on the cooling fan, its not hot enough outside, you are driving getting plenty of air flow through the grille to keep things cool without the assistance of the fan. Its possible that you have no problem at all. Was this answer helpful? I got a 2002 Jetta the cooling fans don’t turn on .
When do you turn on the engine fan?
Engine coolant temperature exceeds approximately 104.25 C (220 F). A/C refrigerant pressure exceeds approximately 1824 kPa (265 psi). When certain DTCs set. At idle and very low vehicle speeds the cooling fans are only allowed to increase in speed if required.
Why are my radiator fans not turning on?
Unplug the coolant temperature sensor while the engine is running. This should cause the fans to turn on low then kick to high, IIRC. Typically when the engine computer loses the signal from the coolant temp sensor, it just turns both fans on high so the engine will not overheat. IIRC if you ground the gauge wire, the gauge should go to full scale.
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.
What should I do if my radiator fan is not working?
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. The fan itself often uses a big fuse of around 50A, while there might also be a separate small fuse to the fan control module.
How does a radiator fan work when the AC is on?
The electric radiator cooling fan assembly is controlled by a thermoswitch located in the side of the radiator. At higher coolant temperatures, the switch closes to start the cooling fans. Any time the coolant temperature rises to higher than normal levels, the fan will start and continue to run until coolant temperature returns to a normal range.
Why does my AC fan not come on?
When the ac is of the radiator hoses both become same heat after a while and the overflow reservoir starts boiling over and the fan do not kick in. Any advise please. You might have an initial temperature sensor which causes the fan to come on when the temperature begins to rise; that sensor might be defective.
Why are my coolant fans not running when AC is turned on?
Coolant fans not running when ac is turned on. AC compressor clutch engage then it will disengage. System has freon in it. It was working find but now nothin7. My car has 234565 miles. My car has an automatic transmission.
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.
When to troubleshoot an electric car cooling fan?
On a warm engine, the fan may come on even if the engine is not running. When working on a hot engine or an engine that is running, keep your hands and tools away from the fan blades and moving components. Troubleshooting a cooling fan that doesn’t work can be a relatively straightforward task at times.
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.
What should I do if my car cooling fan is not working?
On many modern vehicles, if you want to confirm whether your cooling fan is in working order, you can start the engine and let it idle. Set your air conditioning to the MAX setting and turn it on. The cooling fan should come on immediately or within the next couple of minutes.
What should temp be when cooling fan does not come on?
NOTE: if the cooling fan doesn’t come on when the engine has been operating for 20 minutes or more, make sure that coolant is reaching operating temperature, around 220°F (104°C). You may be dealing with a stuck-open thermostat.
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.
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!
When to stop running the fan on a GTI?
This is a risky time to stop pushing coolant around, as hot spots can occur in the rad, even if the engine is relatively cool. The running fan is supposed to get the top of the rad cool quickly. Ready to race!
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.
Where is the fan switch on a VW Jetta?
Try the cooling fan switch. It’s number 24 in the picture. 104 people found this helpful. There is also a module that controls the fan. See the link: http://www.ifixit.com/Answers/View/88436/were+is+the+fan+relay+on+a+2000+vw+jetta