Fan clutch: movement as needed

Useful to know

HELLA describes clutches for radiator fans that allow operation according to the cooling need instead of a permanent full drive. It is a different construction than a simple electric motor with a fin. [1]

First, determine how the specific vehicle's fan is driven. The sound and revs can be changed according to the mode without only following a fault. Do not check by stopping the fin with your hand or object. For a meaningful description, record when the change occurs and what temperature data is available.