Your situation belongs to the lack of oxygen in the combustion chamber and the flameout of the furnace. Check whether the smoke pipe is installed correctly first, and then determine whether the smoke exhaust pipe in the inner layer of the smoke pipe is connected with the furnace. Sometimes, the smoke exhaust pipe in the inner layer is not well connected with the furnace, which leads to the exhaust gas in the smoke collection chamber can not be discharged, which makes the furnace flameout and unable to burn.