The parking heater is used as follows:
1. Press the water pump switch of the heater, and the water pump works. With this switch, the waste heat of the engine can be used to heat the car and defrost the windshield; 2. Press the heater switch, the heater starts to work and ignites automatically; 3. First turn off the heater switch, and then turn off the water pump switch. The parking heater is an on-board heating device independent of the automobile engine, with its own fuel pipeline, circuit, combustion heating device and control device. It can preheat and heat the car engine and cab parked in the cold and low temperature environment in winter without starting the engine. Its working principle is to use the battery and fuel tank of the vehicle to instantly provide power and a small amount of oil, and to heat the circulating water of the engine by burning gasoline, so that the engine can be hot started and the cab can also be heated.