Chevrolet Spark heater blows cold air due to coolant leak on Chevrolet Spark

Some Chevrolet Spark owners report experiencing issues with their heater blowing cold air, which may be caused by a coolant leak in components such as the water pump, radiator, or hoses. This leak can reduce the amount of coolant available for circulation through the heater core, resulting in insufficient hot coolant reaching the heater core to warm the air blown into the cabin. Owners are advised to address coolant leaks promptly to ensure the proper functioning of the vehicle's heating system and to prevent further issues with the heater.