Is It Normal for One Fan to Spin While the Other Doesn't in a Volkswagen?
2 Answers
It is not normal for one fan to spin while the other doesn't in a Volkswagen, and it requires timely inspection and repair. Below is a detailed introduction about automotive maintenance: Overview: Automotive maintenance is a general term for the upkeep and repair of vehicles. It involves using technical methods to diagnose faults in malfunctioning vehicles, identify the causes, and take measures to eliminate the faults, restoring the vehicle to certain performance and safety standards. Others: Automotive maintenance includes major repairs and minor repairs. Major repairs refer to restorative repairs that involve repairing or replacing any vehicle components (including fundamental parts) to restore the vehicle's proper technical condition and fully (or nearly fully) recover its lifespan. Minor repairs refer to operational repairs that involve replacing or repairing individual parts to ensure or restore the vehicle's operational capability.
I just had this issue fixed. For Volkswagen cars, both fans should be running when the AC is on. One fan running while the other stops could be normal when cooling demand is low, but it’s a problem if the engine overheats or the AC cooling noticeably weakens. Common issues include water ingress in the fan motor plug causing poor contact—my left fan plug was oxidized and rusted last time. It could also be a faulty channel in the control module, which requires scanning fault codes with a computer to diagnose. With temperatures often hitting 40°C these days, I recommend regularly cleaning the fluff and debris in front of the radiator to prevent fan overload, which can burn out resistors.