INFINITI Q60 heater not blowing hot air, diagnosed with sludge found in the engine on INFINITI Q60

Some INFINITI Q60 owners report experiencing issues with their heater not blowing hot air, often linked to low coolant levels that prevent hot coolant from reaching the heater core. Additionally, the presence of sludge in the engine can indicate a clogged cooling system, which may hinder the circulation of hot coolant. Some owners have also reported problems with a clogged heater core, restricting coolant flow and resulting in cold air from the vents. Furthermore, engine overheating due to sludge can exacerbate these heating issues. It is important for owners to promptly check and replenish coolant levels, flush the cooling system, and inspect the heater core to maintain proper heating functionality in their INFINITI Q60.