Auto >> AutoSPT >  >> Engine

Why does the radiator fan keeps spinning when key is not on igni tion?

The radiator fan may keep spinning when the key is not on the ignition for several reasons:

1. Engine Coolant Temperature Sensor Malfunction: The engine coolant temperature sensor (ECT) sends signals to the engine control unit (ECU) about the temperature of the coolant. If the sensor is faulty, it may send incorrect readings to the ECU, causing the fan to run continuously.

2. Cooling Fan Relay Issue: The cooling fan relay controls the operation of the radiator fan. If the relay is stuck in the "on" position, it can cause the fan to run even when the ignition is off.

3. Wiring Problems: Short circuits or damaged wiring in the fan control circuit can lead to the fan running constantly.

4. ECU Software Glitch: In rare cases, a software glitch in the ECU can cause the fan to remain spinning after the key is turned off.

5. After-Run Function: Some vehicles are designed with an after-run function that keeps the fan running for a short period after the engine is turned off to help cool the engine down.

If the radiator fan is continuously running when the key is not on the ignition, it's recommended to have it diagnosed by a qualified mechanic or automotive technician to identify and fix the underlying issue.

Auto Repair
How do you close a 1998 Honda Accord sunroof because it is stuck at the tilt and will not open or cannot hear motor anything? How do you get a 2003 Nissan Xterra automatic locking hub to unlock when stuck?
Car Care
NASCAR Next Gen Cars Are More Stock Than The Current Race Cars How do I Know It’s Time To Change My Car’s Oil? Attending a Performance Driving School Could Save Your Butt This Winter and Turn You Into Lewis Hamilton
Engine
Where can one get a free download for John Deere 350C crawler loader tractor operators manual? What is the torque pressure for a oil pump bolt in 350 vortec 1999?
Electric Car
Where is the voltage regulator in a 2001 Chrysler PT Cruiser? 2003 Pontiac Montana - master control will put passenger side window down but not up you can the and with switch Any suggestions Thank you? Spark plug gap 1994 351 ford motor?
Autopilot
How do you install the third row seat if it come with when i got it? Where is the starter on a 2006 suzuki boulevard c50?
Car Photos
How do you change a rear brake light on 2007 Audi a4 advant? Is the 2010 Jaguar XF front wheel drive rear or four drive? How do you take the plastic cover off of a 2003 Hyundai tiburon?