What are the reasons why the diesel parking heater fails to start?
2 Answers
Diesel parking heater fails to start due to reasons such as airlock in the cooling system, thermostat issues, radiator problems, and carbon buildup. Below are detailed explanations for the aforementioned issues: Airlock in the cooling system: If there is an airlock in the engine cooling system, it can cause poor circulation in the cooling system, leading to high water temperature and insufficient heating. Thermostat issues: The engine thermostat opens too early. Radiator problems: The heater experiences overheating, and the radiator and defroster do not function properly. Carbon buildup: 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.
My car's diesel parking heater had the same issue last winter. First, it was insufficient battery voltage—this thing requires over 12V to start up. The old battery couldn't handle it at all, and it only worked after I replaced it with a new one. Fuel system problems are also very common; I once had air bubbles in the fuel line that caused a fuel supply interruption. Some cars fail because the fuel pump burns out or the injector gets clogged by impurities in low-quality diesel. The exhaust system can't be ignored either—if the exhaust pipe is blocked by snow, the exhaust can't escape, and the heater won't ignite. Most importantly, controller failures are a big issue—if it gets water damage or the wiring ages, it stops working. I recommend first testing the battery voltage and then listening for the fuel pump's operating sound.
