The car heating system is not used for a long time, and it may not be hot to use warm air in winter. The main reason is that the small warm air tank is blocked. After the small warm air tank is blocked, hot water does not pass through the small water tank, which leads to the phenomenon that warm air cannot be generated. The blockage of the small heating tank may cause cold air to blow out, which is caused by the owner's long-term failure to replace the antifreeze. If the air conditioning pipe is not cleaned for a long time, the small heater tank will be easily blocked. It is suggested that car owners should conduct a comprehensive maintenance of the car's heating system before winter comes.
The heater control panel is damaged, just like the light bulb control switch at home. When the owner turns on the heater switch, because the heater switch fails, the corresponding heater power supply signal cannot be transmitted, resulting in the phenomenon that the heater is not hot. If the heater is not hot due to the switch of the heater, the owner needs to go to a professional repair shop or a 4s shop for treatment.
There is air in the waterway, which leads to insufficient hot air supply and abnormal warm air. There is gas in the waterway, which will not only make the warm air not hot, but also lead to other faults caused by the high temperature of the engine, which needs to be dealt with by the owner in time. If he can't handle it himself, it is recommended to find a professional maintenance person to handle it.