What Causes the Lack of Heating in the Classic Focus Hatchback?

[KateRose]

Classic Focus Hatchback's lack of heating is caused by issues in the engine's cooling system or the heating control mechanism components, which are not functioning properly. The specific reasons are as follows: Introduction to Engine Cooling System Issues: The engine's cooling system may have airlocks, preventing the car's cooling circulation system from operating normally, leading to insufficient heating. If the inlet pipe of the heater core is hot while the outlet pipe is cold, it indicates a blockage in the heater core, which needs to be replaced. Introduction to Heating Control Mechanism Component Issues: It could be due to a clogged filter, resulting in insufficient airflow blown into the cabin by the blower or improper distribution of hot and cold air. Additionally, check if the blower's various speed settings can reach sufficient RPM and inspect whether the hot/cold air control flap has any detachment issues, requiring timely repair.