𝐄𝐧𝐠𝐢𝐧𝐞 𝐟𝐚𝐧

Fans are know for being very reliable. Your car's fan cools the radiator (with antifreeze inside) and condenser (with refrigerant inside). This helps the engine and AC system maintain the proper operating temperatures. 
To maintain the fan, check for anything that could block the fan. The engine fan can blown particles into the fins of the radiator and condenser, blocking air flow. Clean off any debris from the metal fins of the radiator and condenser, to prevent overheating.