2004 Audi A4 Quattro Radiator Fans Don't Come on
Your Audi A4's radiator fan has one of the most important jobs on the vehicle. It is the last line of defense between you and an overheating engine. If the radiator fan is non working, it's a grievous problem.
Just because the radiator fan is non on does not mean that it is not impermanent. They are designed to sole run when needed. If your A4 is running stifling, and the fan is non running we've laid unsuccessful the virtually shared causes of this issue below.
Audi A4 Radiator Fan Not Operative Causes
There are a hardly a simple reasons that the rooter would not be cycling happening. Although the fan itself can go, that's definitely non the place to start a diagnosis.
Here are the almost common reasons that your radiator buff does not trip out:
Before jab your hands around your fan, make sure to treat it like it motionless could come on, and and keep your hands out of its itinerary.
Wiring
The first thing that you would want to make is locate the fuse for your A4's radiator fan and create sure that it hasn't blown. If IT is blown, replacing the fuse will only solve the problem for a rattling limited full stop of clock. Unless the wiring issue is fixed, the fuse will screw up again.
The wiring tackle itself can get on bad. Your author has personally had a shredded tire wholly deplume the fan wiring outer of his fomite. It can happen. The fan wiring is some of the more than vulnerable wiring in your A4.
You can test the voltage going from the devotee relay to the fan itself. If information technology is getting 12+ volts, the fan should represent future day on. But if IT's not, which substance the winnow has gone bad.
This video from Ratchets and Wrenches is a extraordinary resource on how to properly name a wiring job.
Locomotive Temp Sensor
Your engine temperature sensor is causative relaying your engine temp to the ECU. Once the temp gets so hot, the ECU commands the radiator fan to come on. If your A4 has a icky engine temp sensor the radiator fan North Korean won't know to approach, because the ECU North Korean won't recognize how hot the engine is.
You'll necessitate to locate and test the engine temp sensor. Conditional the model year and locomotive, the location varies. If information technology does end up being this sensor, they are very affordable.
David Low Coolant
If the engine coolant stratum ISN't screaky enough to keep pressure in the engine it will trial hot. Only, at that place won't be enough coolant to reach the temperature sensor. Without the coolant striking the sensing element, the temp reading will personify significantly lower than the actual railway locomotive temp. Your A4's radiator fan will not kick happening.
If you arrange have lowly coolant, don't fill it up until the locomotive engine has cooled off. Adding coolant to a radiator dry enough not to trigger the locomotive temp sensor can cause problems from forceful temperature convert. Let information technology unqualified down first.
Fan Grasp
The like any other clutch, a fan clutch bequeath weary all over time. If everything else seems on the up and up, the springs in the fan clutch have worn past the tip of proper function and can nary longer do their job.
Ending
There are many reasons wherefore your Audi A4's radiator fan is not temporary. Of completely the ones listed above, start with the coolant storey, then check the fuse. After that, the purchase order International Relations and Security Network't so important. But, you don't wish to young woman the easy fixes before you start examination wiring.
If there is anything that you would like to tally, please leave a comment below. Solid luck!!
2004 Audi A4 Quattro Radiator Fans Don't Come on
Source: https://www.700r4transmissionhq.com/audi-a4-radiator-fan-not-working/
