What are the reasons why the diesel parking heater fails to start?
2 Answers
Reasons why the diesel parking heater fails to start: Cooling system failure: There is airlock in the engine cooling system, which can cause poor circulation in the cooling system, leading to high water temperature and insufficient heating; Heater failure: The engine thermostat opens too early; the heater overheats, and the radiator and defroster do not work properly. Severe carbon buildup: There is severe carbon buildup in the diesel heater combustion chamber. You can take it to a 4S shop or repair shop to clean the diesel heater and remove the carbon deposits; poor fuel quality can cause the diesel heater to emit white smoke and fail to start. Simply replace the fuel, preferably from a reputable gas station. Although it may be more expensive, it ensures better protection for the vehicle; Ventilation failure: There is an issue with the ventilation system, causing poor airflow. Enlarging the ventilation outlets of the system can solve the problem.
As a veteran in the auto repair industry, I often deal with parking heater startup failures, with the root causes typically being insufficient power supply or fuel system malfunctions. Low battery charge is the most common issue, especially after long-term vehicle parking; if a multimeter shows voltage below 12V, startup will fail. Diesel fuel line blockages or abnormal fuel pump operation can also prevent ignition—if you don't hear the startup humming noise, the pump might be faulty. Control unit failures, such as relay burnout or poor wiring connections, are also possible; check if fuses are blown. It's advisable to test the system before winter and observe dashboard indicator lights during startup. If unresolved, seek professional repair to prevent further damage. Preventive measures include running the heater periodically during vehicle inactivity to prevent corrosion.
