Citroen saxo new engine overheating fan wont come on?

If your Citroën Saxo is overheating and the fan isn't coming on, it could be due to a faulty temperature sensor, a blown fuse, or a malfunctioning fan relay. First, check the fuses related to the cooling system and replace any that are blown. If the fuses are fine, test the temperature sensor and the relay, as either could prevent the fan from activating. If these components are functioning correctly, it may be worth checking the wiring or the fan motor itself for any issues.