Charcoal and grease filters get clogged over time. Without replacement, airflow weakens and odors linger.

If smells remain after cooking, filters may be saturated or the fan isn’t working correctly. This makes the hood ineffective.

Frequent light failure points to electrical issues. This can also indicate overheating inside the hood.

If the fan won’t turn off, the control switch may be defective. This wastes energy and wears down the motor.

Faulty wiring in ductless hoods can cause shocks or sparks. This is dangerous and requires immediate repair.

Replace filters every 3–6 months to keep odors under control.

Clean filters monthly to avoid blockages and poor air circulation.

Ensure vents aren’t blocked to maintain proper airflow.