Range hood does not start

**原因**：電源故障、保險絲燒毀、開關損壞、電機故障

**處理方法**：檢查電源插頭是否插緊、更換保險絲、檢查開關接線、聯繫專業人員檢修電機

**Causes**: Power failure, blown fuse, damaged switch, motor failure
**Solutions**: Check power plug, replace fuse, inspect switch wiring, contact professional for motor repair

Range hood has power but does not rotate

**原因**：電容損壞、電機卡死、風輪被異物卡住

**處理方法**：更換啟動電容、手動轉動風輪檢查是否卡死、清理風輪異物

**Causes**: Damaged capacitor, seized motor, fan wheel jammed by foreign objects
**Solutions**: Replace start capacitor, manually rotate fan wheel, clean foreign objects

Range hood makes loud buzzing noise

**原因**：風輪不平衡、軸承磨損、固定螺絲鬆動

**處理方法**：校正風輪平衡、更換軸承、緊固所有固定螺絲

**Causes**: Unbalanced fan wheel, worn bearings, loose fixing screws
**Solutions**: Balance fan wheel, replace bearings, tighten all fixing screws

Range hood suction power reduced

**原因**：濾網堵塞、風輪油垢過多、管道堵塞、電容老化

**處理方法**：清洗濾網、清理風輪油垢、疏通排風管道、更換電容

**Causes**: Clogged filter, excessive grease on fan wheel, blocked duct, aging capacitor
**Solutions**: Clean filter, remove grease, unclog duct, replace capacitor

Range hood has serious smoke backflow

**原因**：止回閥故障、排風方向不當、公共煙道壓力過大

**處理方法**：更換止回閥、調整排風方向、安裝逆止閥門

**Causes**: Faulty check valve, improper exhaust direction, excessive public flue pressure
**Solutions**: Replace check valve, adjust exhaust direction, install anti-backflow valve

Range hood leaks oil and water

**原因**：油杯滿溢、油管堵塞、密封膠老化、安裝傾斜

**處理方法**：清理油杯、疏通油管、更換密封膠、重新調整安裝角度

**Causes**: Overflowing oil cup, blocked oil pipe, aging sealant, tilted installation
**Solutions**: Clean oil cup, unclog oil pipe, replace sealant, adjust installation angle

Range hood auto on/off malfunction

**原因**：控制面板故障、按鍵老化、電路板損壞

**處理方法**：更換按鍵、維修控制面板、更換電路板

**Causes**: Faulty control panel, aging buttons, damaged circuit board
**Solutions**: Replace buttons, repair control panel, replace circuit board

Range hood light not working but fan spins

**原因**：燈泡燒毀、燈座接觸不良、燈路保險絲燒毀

**處理方法**：更換燈泡、清潔燈座接點、更換保險絲

**Causes**: Burnt bulb, poor lamp holder contact, blown light circuit fuse
**Solutions**: Replace bulb, clean lamp holder contacts, replace fuse

Range hood stuck and cannot rotate

**原因**：電機卡死、風輪被油垢粘住、軸承損壞

**處理方法**：拆卸清洗風輪、潤滑軸承、更換損壞零件

**Causes**: Seized motor, fan wheel stuck by grease, damaged bearings
**Solutions**: Disassemble and clean fan wheel, lubricate bearings, replace damaged parts