Why Radiator fan relay stuck?

A radiator fan relay can get stuck due to several reasons, including electrical issues like short circuits or corrosion on the relay contacts, which prevent it from opening or closing properly. Overheating can also cause the relay's internal components to fuse together. Additionally, a malfunctioning temperature sensor may continuously signal the relay to stay engaged, resulting in it being stuck in the "on" position. Regular maintenance and inspections can help prevent these issues.