It’s recommended to schedule preventive maintenance at least once a year, especially in areas with hot and dusty climates. However, it’s important to watch for the following signs that a repair is needed:

Coolant loss: If you notice the coolant level constantly dropping, you may have a leak in the radiator.
Poor cooling performance: If the system takes longer to cool the room or doesn’t reach the desired temperature, the radiator may need to be cleaned or repaired.
Unusual noises: Strange noises coming from the cooling system may indicate a problem with the radiator or other components.
Strange odors: A gas or burning smell may be a sign of a coolant leak or an electrical problem.