1. Clean the dust from the gas boiler

　　For the dust and oil left on the surface of the wall-hung boiler, you can use a soft towel to wipe it; you can use a brush to clean the dust on the fan flue and other components, and do not wipe it with force, so as not to cause damage to the internal components of the wall-hung boiler .

　　2. Clean scale and other impurities

　　The maintenance of waterway components includes board replacement and descaling, water pump inspection, hot water temperature sensor inspection, zero cold water check valve inspection, etc. Since it involves the maintenance of waterway components and the inspection of related precision instruments, it is necessary to contact professionals for door-to-door maintenance.