The main indicators for determining if a range hood needs cleaning are noticeable changes in suction power, increased noise, and unpleasant odors. Here are the specific signs:
Significantly Weak Suction Power: When cooking, fumes cannot be effectively removed and spread throughout the hood, even at high settings. This indicates that the air duct or impeller may be clogged with grease.
Increased Operating Noise: A range hood that was previously running smoothly begins to make a roaring or vibrating sound. This is usually due to grease buildup on the impeller causing imbalance and increasing the motor load.
Pungent Odor: A lingering smell of cooking fumes or rancid oil can be detected even after the range hood is turned off, indicating that the internal grease has oxidized and deteriorated.
Severely Greasey or Dripping Grease Filter: Observe that the grease filter and grease cup are more than two-thirds full of grease, or even dripping oil, affecting normal use.
Difficulty Starting the Motor or Frequent Circuit Breaker Tripping: Long-term grease buildup can cause capacitor aging and short circuits, leading to abnormal starting or circuit breaker tripping. Power consumption is quietly increasing: Oil buildup increases the weight of the impeller, causing the motor to work under overload, which may lead to an increase in energy consumption of 15%-30%.
