Coolant is essential for maintaining safe engine operating temperatures. It absorbs heat from the engine and transfers that heat through the radiator where it can be cooled. If coolant levels drop too low, the cooling system may struggle to regulate engine temperature effectively.
Low coolant levels are often caused by leaks, worn hoses or cooling system faults. Recognising the early warning signs can help prevent engine overheating and costly mechanical damage.
One of the most common symptoms of low coolant is engine overheating. Without enough coolant circulating through the engine and radiator, heat cannot be removed efficiently.
This may cause the temperature gauge to rise or the engine overheating warning light to appear on the dashboard.
If the cabin heater stops producing warm air, it may indicate that coolant levels are too low. The heater relies on hot coolant flowing through the heater core to produce warm air inside the vehicle.
When coolant levels drop, the heater system may stop working effectively.
Some vehicles include a coolant level sensor that monitors coolant levels in the expansion tank. If the coolant level drops below the recommended level, a warning light may appear on the dashboard.
Coolant has a distinctive sweet smell. If coolant leaks from the radiator, hoses or water pump, drivers may notice this smell coming from the engine bay.
Low coolant levels are often caused by leaks within the cooling system. Drivers may notice puddles under the vehicle or dried coolant residue around engine components.
If coolant levels continue to drop, the cooling system should be inspected quickly to prevent engine overheating.
MotorLoom analyses vehicle symptoms and overheating issues to help identify possible causes.
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