If your 2021 Hyundai Palisade cooling fan runs constantly during summer driving, it may be working exactly as designed - or signaling a cooling system struggling to maintain proper temperature. Understanding normal versus abnormal operation helps identify real problems.
When Constant Fan Operation Is Normal
In hot weather above 90°F, the fans may run continuously to manage heat from the engine, AC condenser, and transmission cooler. With AC on maximum, fans should run to cool the condenser. After driving hard, fans may run for several minutes after shutdown (afterrun feature). This is all normal operation.
When It Indicates a Problem
Fans running at high speed immediately on startup before the engine warms suggests sensor or control issues. Fans running even in cool weather when AC is off indicates possible stuck relay or ECM problems. Fans running constantly while engine temperature still climbs suggests insufficient cooling capacity - the fan is trying but failing.
Diagnosing the Difference
Monitor coolant temperature with a scan tool. Normal operation shows temperature stabilizing in the proper range (195-220°F) with fans cycling. Problem operation shows temperature climbing toward overheating despite fan operation, or fans running when temperature is actually low.
Code P0480 Specifics
This code indicates a cooling fan circuit malfunction. It may set if the fan runs when it shouldn't (stuck relay) or doesn't run when commanded. Check fan relay operation and wiring before assuming the fan motor is faulty.