Solutions:
1. Although the range hood motor rotates normally, the machine doesn't absorb smoke. Usually it needs to check whether the check valve is open at first.
2. Please check whether the exhaust pipe bends, collapses or deforms to affect exhaust work.
3. Please check whether the exhaust pipe is dropped from the flue outlet.
4. Please check whether the flue clogs.
5. Please check whether it will clog the vent when the exhaust pipe extends into the inner wall of the flue.
6. Please focus on the examination of air duct. If find the problem, the failure of somke absorption will be smoothly done.