A drop in range hood suction is often gradual, and many users adapt without knowing the cause. Master Xiao Yijiang explains: **Main Causes of Reduced Suction:** 1. **Grease buildup on the impeller:** Infrequent deep cleaning leads to heavy grease accumulation, slowing rotation and reducing airflow. 2. **Stuck backdraft damper:** Grease causes the damper in the shared flue to stick, preventing proper opening and blocking exhaust. 3. **Excessive pipe bends:** Too many sharp bends in the ductwork increase air resistance. 4. **Motor bearing wear:** Worn bearings prevent the motor from reaching rated speed. **DIY Maintenance:** - Clean the oil cup and filters monthly. - Spray the impeller with a specialized cleaner every quarter. - Check that the backdraft damper opens and closes smoothly. **Professional Deep Cleaning Recommendation:** - Schedule a full teardown deep clean at least once a year. - We clean the impeller, scroll housing, and motor casing. - We inspect the motor's operating condition. Xiao Yijiang's deep cleaning service includes complete disassembly and functional testing. After cleaning, your suction will feel like new. Call 400-1060-908 to book an appointment and enjoy a fresh kitchen.
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