The forced exhaust gas water heater forcibly exhausts smoke through an exhaust motor arranged above the water heater, so that the burning waste gas can be quickly discharged outside. Power is supplied to the gas water heater through an external plug. The internal parts mainly include: pulse igniter, ion induction probe, temperature controller, wind pressure switch, safety tube (some gas water heaters have it), starting capacitor, exhaust motor, microswitch, valve control solenoid valve, water control valve, water-gas linkage device, burner, circulating water tank, master circuit control package, ignition indicator lamp, temperature indicator screen (the old ones don't have it) and gas proportional regulating valve.

in the case of power supply, water supply and ventilation, due to the pressure of water flow, the microswitch is turned on, the exhaust motor starts to work and exhaust, and at the same time, the pulse igniter starts to discharge. The gas control solenoid valve opens the air flow to enter the combustion chamber, and the gas is ignited by electric spark, and the circulating water tank starts to heat, and the hot water flows out quickly after the cold water is discharged. If the water temperature is higher than 5 degrees, limit the operation of the temperature controller, cut off the power supply and extinguish the gas. If the outdoor wind pressure is too high or the flue is blocked, the circulating water tank will be used for a long time, resulting in the melting and adhesion of the heat exchanger of the water tank and poor ventilation, the wind pressure switch will turn off the power supply and the gas water heater will stop working. Usually, the wind pressure switch is easy to break down, which shows that the gas water heater can be started, but it will automatically turn off in a few seconds or minutes.