Under Cabinet Kitchen Broan Exhaust Fan Parts List: Find Your Perfect Fit

A well-functioning under-cabinet exhaust fan is the unsung hero of any busy kitchen. It pulls steam, grease-laden vapors, and cooking odors out of the air before they settle on surfaces or trigger smoke alarms. Broan has been a trusted name in residential ventilation for decades, and knowing the exact replacement parts for your model can mean the difference between a quick fix and a fan that underperforms. This guide breaks down the most commonly replaced Broan under-cabinet exhaust fan parts, helps you identify your model, and walks through replacement steps so you can keep your kitchen fresh and your fan running efficiently.

Key Components of Broan Under-Cabinet Exhaust Fans

Damper/Duct Connectors

The damper—or backdraft damper—is a critical one-way valve that prevents outside air, pests, and cooking odors from drifting back into the kitchen when the fan is off. Broan models commonly use 4-inch dampers, and part numbers such as the S97014185 appear across many under-cabinet and NuTone series fans. In practice, a worn damper often sticks open or closed, reducing airflow efficiency and increasing energy use. Replacing a compromised dammer restores proper ventilation cycle behavior. For more on this, see our guide on restaurant kitchen exhaust cleaning.

TNITRIB S97014185 duct connector, designed for 4-inch Broan exhaust fan ducts

Broan S97014185 4-inch damper duct connector installed on exhaust fan

Uyzo S97014185 4-inch damper connector compatible with Broan Nutone ventilation fan

Laofudech S97014185 4-inch damper duct connector for multiple Broan Nutone models

Homhelar S97014185 duct damper connector fitting Broan Nutone 4-inch ventilation fan

Grille & Spring Assemblies

The grille secures the fan opening and protects the internal motor while allowing unrestricted airflow. Many Broan under-cabinet fans use spring-loaded retainers—often marked S99140208—to hold the grille in place. These springs fatigue over time, leading to a loose or rattling grille that can transmit noise into the duct run. A tight grille fit also minimizes grease buildup on the fan housing.

Delixike S99140208 grille spring replacement for Broan Nutone vent fan series

Nutone S97006651 fan grille assembly for bathroom ventilation system Nutone S97006651 fan grille, lightweight plastic construction

Motor Units

The motor is the heart of the exhaust fan, driving the impeller that moves air. Broan bath and fan motor units such as the S97012029 are designed for specific housing sizes and voltage ratings. Symptoms of a failing motor include reduced CFM (cubic feet per minute), unusual humming or grinding noises, and intermittent operation. Because many under-cabinet motor units are permanently lubricated, replacement is typically the only service path rather than oiling. For more on this, see our guide on marine first aid kit contents list.

Broan S97012029 motor unit replacement for Broan bath fan models

Light Lenses & Covers

Several Broan under-cabinet combos integrate a light fixture beneath the fan housing. The light lens—often a part like the prime&swift S97011813—protects the bulb and directs light downward. Cracks or yellowing in the lens reduce illumination quality and can allow moisture to reach the bulb socket. Replacing the lens is a straightforward swap that refreshes both airflow and kitchen lighting without rewiring.

prime&swift S97011813 light lens replacement white fit for Broan bathroom light covers prime&swift S97011813 light lens, white finish fits several Broan models

Exhaust Filters

Aluminum mesh or baffle filters trap grease particles before they enter the ductwork, a vital safeguard against kitchen grease fires and airflow restriction. The Nutone Nautilus/Broan replacement filter (aluminum, 9.5-inch) fits numerous Broan-NuTone models. Over time, filtered grease accumulates, reducing airflow and increasing noise. Most manufacturers recommend cleaning or replacing filters every six months under normal cooking conditions; high-volume kitchens may need quarterly service. For more on this, see our guide on sports first aid kit contents list.

Nutone Nautilus replacement exhaust fan filter aluminum 9.5-inch for Broan models

Identifying Your Broan Model & Matching the Right Part

Finding the correct replacement begins with the model number, usually located on a label inside the grille, on the fan housing interior, or on the original packaging. Broan-NuTone uses a combination of letters and numbers that indicate series, size, and function. For example, the 757SN, MS120L, and 680FL designations each correspond to specific housing dimensions and CFM ratings. When the label is faded or missing, measuring the duct opening (typically 3½-inch or 4-inch round) and counting the spring clips on the grille narrows the parts list significantly.

The Home Ventilating Institute (HVI) rates residential exhaust fans for airflow and noise, which you can reference at https://www.hvi.org to ensure your replacement part meets the original performance specs. Cross-referencing your fan’s HVI-listed CFM with the part’s compatibility notes prevents the common mistake of installing a low-CFM damper on a high-capacity fan, which can stall motor life. For more on this, see our guide on best blenders for smoothies under 100.

Step-by-Step Replacement Guides

Replacing a Damper/Duct Connector

1. Power down—switch off the circuit breaker feeding the exhaust fan. Verify no voltage at the switch with a non-contact tester.
2. Remove the old damper—from inside the duct or fan housing, unscrew the retaining fasteners. If the damper is clamped, gently pry the clamp away with a flathead screwdriver.
3. Align the new damper—match the 4-inch round opening; the arrow on the damper housing should point toward the exterior vent.
4. Secure and test—fasten the screws, restore power, and run the fan for a minute. Confirm the damper flaps snap shut completely when the fan is off.

Swapping a Grille/Spring Assembly

1. Release the springs—depress each spring clip with a small flathead or needle-nose plier; the grille should lift free.
2. Detach any wiring—if the grille includes a light socket, disconnect the wire nuts or push-in connectors before full removal.
3. Fit the new grille—align the spring pockets with the housing tabs; press firmly until the springs snap into place.
4. Reconnect and verify—restore power and check that the grille sits flush with no rattling.

Filter Replacement

1. Slide out the old filter—most under-cabinet filters pull straight out from the front or bottom of the housing.
2. Clean the filter well—wipe the interior housing with a damp cloth to remove grease residue before inserting the new filter.
3. Insert the new filter—ensure the aluminum mesh sits flat; the filter should slide in with modest resistance, not force.

Light Lens Swap

1. Unclip the lens—gently push the lateral clips outward or rotate the lens 90 degrees depending on the model.
2. Remove the bulb—if the lens encloses the bulb, twist the bulb base counterclockwise before pulling it out.
3. Reverse for the new lens—position the new lens, reinsert the bulb, and snap the lens into place.

Compatibility & Interchangeability Notes

Broan-NuTone naming can seem opaque, but patterns emerge. The S97014185 damper/duct connector appears across the 757SN, 763N, 680FL, and 683L series, all sharing a 4-inch round duct. The S97006651 grille fits many NuTone and Broan 370-, 570-, and 670-series housings. When shopping, note that "Broan" and "NuTone" often refer to the same product family; a part labeled for NuTone MS120L frequently installs on the corresponding Broan CFM model. Always verify the part number against the fan’s serial label—universal-fit claims occasionally omit model-specific constraints such as voltage (120V vs. 240V) or housing depth.

A practical tip: keep the original part number sticker intact until the new part is confirmed fitting. Photograph the label with your phone before discarding the old component; this visual record speeds future repairs and helps contractors match parts without guessing. For more on this, see our guide on kitchen hood cleaning certification online.

Maintenance Best Practices for Longevity

• Clean the grille every 3 months—use a vacuum brush attachment to remove dust and a mild degreaser on the mesh if grease has built up. A clean grille improves airflow by up to 15 percent, according to typical service data.
• Replace or clean the filter every 6–12 months—high-heat cooking (frying, searing) shortens this cycle. Mark the replacement date on the filter frame with a permanent marker.
• Inspect the damper annually—with the fan off, verify the damper flap moves freely and seals tightly. A stuck damper is the most common cause of perceived "weak" airflow in otherwise healthy fans.
• Check the motor for unusual noise—a hum that changes pitch when the fan speed control is adjusted often signals bearing wear. At that stage, motor replacement is more cost-effective than repeated lubrication attempts.

When to Seek Professional Help

If the fan hardwires directly into the home’s electrical panel, or if you discover damaged wiring, burned insulation, or a tripping breaker during part replacement, stop and consult a licensed electrician. Persistent motor noise after a fresh motor install, or airflow that remains weak despite new filters and a functional damper, may indicate duct routing issues, improper sizing, or blocked exterior vents—scenarios best evaluated by a professional HVAC technician. Keeping original purchase receipts and warranty documents on hand can also streamline any covered repairs through Broan’s customer service.

Conclusion

Equipping your under-cabinet Broan exhaust fan with the right replacement parts doesn’t require guesswork. By identifying your model number, matching the correct damper, grille, motor, filter, or lens, and following the step-by-step replacement steps above, you restore both air quality and fan efficiency with minimal time and tools. Regular maintenance—filter swaps, damper checks, grille cleaning—extends the fan’s service life and keeps your kitchen environment comfortable year-round.

Need the exact part for your fan? Locate the model number on the housing or consult Broan’s official parts lookup tool, then match with the compatible replacements above. Your kitchen’s air quality—and your peace of mind—depend on a proper fit.