THE SHORT ANSWER
If cooking smoke or odors linger with the range hood running, confirm the fan setting, identify whether the hood exhausts outdoors or recirculates, and check its filter-care instructions. A dirty or incorrectly fitted filter can affect performance. If ordinary operation and approved filter care do not help, ask for an airflow and installation assessment instead of opening the fan housing.
Before you try anything
Stop cooking if smoke becomes excessive. A fire, gas odor or an alarm requires the appropriate emergency response, not these checks. Let the cooktop and hood cool before any permitted filter care. Follow the manual for switching off or isolating power. Do not reach into the blower, remove electrical covers, use a flame or create smoke to test suction. Leave roof, wall-cap and duct access to a qualified person.
Before you begin
For an installed residential range hood above a cooktop that runs but does not seem to capture normal cooking smoke or odors well. This does not cover a microwave ventilation system, a downdraft unit, a fan that will not start or an active fire. Model instructions determine filter type, cleaning, controls and installation requirements.
The hood model, owner manual, filter-care history and any installation paperwork that identifies its ventilation setup. Note when smoke escapes and which ordinary fan setting was in use. Have cleaning supplies or a replacement filter only after checking what the specific model permits.
In a rental, report the problem to your landlord or property manager before making repairs. Building rules and local requirements vary.
Work through the checks
- 01
Separate the light from the fan
Confirm that the fan control is selected and the blower responds to its normal speed settings. A working light alone says little about ventilation. Stop for grinding, a burning smell or a nonresponsive control and arrange service.
- 02
Identify where the air is meant to go
Use the manual or installation record to establish ducted outdoor exhaust or indoor recirculation. Do not assume a visible chimney cover proves there is an outdoor duct. If the setup is unknown, ask the installer or maintenance before buying filters.
- 03
Review the ordinary cooking routine
Follow the manual for starting the fan before cooking and leaving it on afterward. Select a suitable normal speed for the cooking being done. Note whether escaping smoke coincides with drafts from a nearby fan or air register; do not redirect equipment or create a test cloud.
- 04
Inspect the filters only as the manual allows
With the cooking area cool and the hood safely switched off as directed, check accessible filters for buildup, damage or poor seating. Clean a washable grease filter by its approved method, then dry and refit it as instructed. Do not run the hood with the required filters missing.
- 05
Treat odor filters as a separate item
A recirculating setup may require a compatible charcoal filter in addition to grease filtration. Whirlpool specifies replacement rather than washing for its charcoal filters. Identify the exact filter and care schedule for your hood; a generic cleaning recipe or fixed replacement interval may not apply.
- 06
Request an assessment if capture stays poor
Report the model, ducted or recirculating setup, settings, filter care and whether the problem is new or longstanding. A ventilation professional can assess duct restrictions, installation clearances, capture and makeup-air requirements. Do not change ductwork or block room vents to experiment.
What your result means
These observations help choose a next step. They do not confirm a diagnosis.
| What you notice | What it tells you | Next step |
|---|---|---|
| Only the light works or the fan does not respond | This is a fan or control symptom before a capture question | Stop troubleshooting airflow and arrange model-specific service. |
| Grease filter is dirty or not seated | Routine filter care may be needed | Use the manual-approved method and reinstall it correctly. |
| Recirculating hood still leaves odors | Filter condition and the limits of recirculation matter | Check the specified odor filter; ask about persistent performance limits. |
| Outdoor-vented hood remains poor after filter care | The air path or installation may need assessment | Ask a qualified installer to inspect; keep ducts and covers intact. |
| Performance changed after remodeling or fan changes | Room airflow or installation conditions may have changed | Tell the contractor what changed rather than treating the filter as the only cause. |
Know what happens next
Check the outcome
During later ordinary cooking, note whether the original smoke escape or lingering odor has improved at the recommended setting. Keep all required filters installed. Do not deliberately burn food or use a flame, tissue or loose object as a suction test. Improved smell does not measure airflow, establish indoor air quality or show that a combustion appliance is safe.
When to call a professional
Arrange service for unusual noise, a burning smell, failed speed controls or persistent poor capture. Use a qualified ventilation contractor for uncertain duct routing, installation questions or makeup air. Rules and required airflow vary by location and equipment; this guide does not prescribe a universal CFM threshold, duct size or mounting height.
Take useful notes with you
A short record makes it easier to explain the problem to a landlord, technician, or responder. Do not collect notes during an emergency.
Notes stay in this page until you leave or reload. Download a copy to keep them. They are not sent to us.
Common questions
Will a new charcoal filter make a ductless hood vent outdoors?
No. A recirculating hood returns air to the kitchen. Its filters can reduce grease and odors, but replacing one does not create an outdoor exhaust path.
Can I wash every range hood filter?
Check the exact type. Washable metal grease filters and replaceable charcoal filters have different care requirements. Follow the hood manual rather than putting an unidentified filter in the dishwasher.
Does louder fan noise mean more air is being removed?
Noise alone cannot confirm effective capture. Broan lists dirty filters and duct restrictions among possible contributors to noise. Record a change in sound and have persistent problems assessed.
Should I open a window to prove the house needs makeup air?
Do not use that as a diagnosis. A qualified contractor should assess ventilation balance and applicable requirements. Changing an opening also changes room drafts, so it does not isolate a single cause.
Sources & scope
This is a desk-researched guide, not a hands-on test or an on-site diagnosis. A licensed tradesperson has not independently reviewed this edition. Follow your product’s manual and local requirements.
- Whirlpool — Not Removing Smoke or Odor
Read 2026-10-19. Supports early fan use, properly installed clean filters, room air-current effects and installer review of venting/makeup air. No universal code threshold, mounting dimension or homeowner duct modification is prescribed.
- Whirlpool — Cleaning or Replacing the Filters in a Vent Hood
Read 2026-10-19. Supports controls off/cool before care, approved grease-filter cleaning and replacing its nonwashable charcoal filter. Its six-month example is not used as a universal service interval.
- Broan-NuTone — Range Hood FAQs
Read 2026-10-19, ducted/ductless, filter care, persistent smoke, noise and makeup-air sections. Supports setup distinctions and professional assessment; generic CFM and height examples, sales advice and DIY installation are excluded.
Published 2026-10-19 · Our editorial policy · Report a correction