Replacing Heater Blower Wheel S99020290 in a Broan Bath Fan

If your Broan bath fan’s heater is making noise or not pushing out enough warm air, the blower wheel could be the issue. Replacing part S99020290 is an easy fix that can restore proper airflow and keep your bathroom cozy again.

The information in this article may not apply to your specific appliance model. We recommend consulting your manufacturer’s documentation or contact us with any questions.

What You Need

To complete this DIY bath fan repair, you’ll need:

• Flathead screwdriver
• 1⁄4 inch nut driver
• Phillips screwdriver
• Needle nose pliers
• 8 inch Allen wrench
• 3⁄8 inch nut driver
• Replacement heater blower wheel part #S99020290– Take your model number to AppliancePartsPros.com to locate the correct part for your model. 

Safety First

Safety comes first when working on any appliance. Here are some practical tips to help keep you safe:

• Always turn off the power by unplugging the appliance or switching off the circuit breaker before starting. This protects you from the risk of electric shock.
• Wear insulated gloves to protect your hands from sharp edges, pinching hazards, or debris.
• Take your time and work at a steady pace to avoid accidents or injuries.
• Make sure your workspace is well-lit so you can clearly see and access the parts you’re working on.
• Keep your area organized and free of clutter, and ensure children and pets are kept away from the workspace.
• Never handle internal parts with wet hands. Make sure both your hands and the work area are completely dry.
• Check your appliance’s user manual for specific instructions or safety guidelines related to your repair.
• Handle parts gently to prevent damaging the appliance or injuring yourself by using too much force.
• Wear safety glasses if you’re dealing with chemicals, dust, or large debris to protect your eyes.
• If the appliance was recently used, give it time to cool down before working on any heated components.
• Take photos or notes of wiring connections before disconnecting anything. This makes reassembly much easier.
• Avoid touching exposed wires or terminals. If you need to handle wires, use non-conductive tools or wear insulated gloves to reduce the risk of electrical shock.

Removal and Disassembly Steps

1. Shut off the power to the bath fan at your home’s breaker panel
2. Using a flathead screwdriver, compress the locking tab to remove the outer lens cover on the fan grille assembly. Set this plastic lens cover aside.
3. Next, unscrew the light bulb by hand while supporting the grille and reflector housing so they do not fall.
4. Use a 3/8-inch nut driver to loosen and remove the decorative acorn nut under the reflector assembly.
5. Unplug the 2-prong reflector assembly from the light receptacle and detach this component completely. Set aside.
6. Disconnect the blower and heater electrical plugs using needle nose pliers for better grip.
7. Use a Phillips screwdriver through the air intake vents to remove the two pan head screws mounting the blower housing to the main bath fan frame.
8. Supporting the heater scroll housing with one hand, employ a flathead screwdriver to carefully pry and release the snap tabs attaching the housing.
9. Fully detach and remove the heater scroll housing to access the blower wheel.
10. Using a 1/4-inch nut driver, unscrew and remove the four hex screws holding the protective heater cover in place. Take off this cover plate.
11. Behind the heater cover is the blower wheel component. Reach inside the housing and locate the set screw holding the old blower wheel onto the motor shaft.
12. Using an 8-inch Allen wrench, loosen the set screw a few turns and then fully remove the old broken heater blower wheel by sliding it off the shaft.

Installation and Reassembly Steps

1. Unpack the new heater blower wheel replacement part. Note the location of the set screw hole along one side.
2. Carefully align this set screw hole to the flat edge of the blower motor shaft and slide the wheel fully onto the shaft. Center the wheel within the scroll housing.
3. Using the 8-inch Allen wrench again, tighten the set screw firmly to secure the part. Avoid over-tightening.
4. With the blower wheel centered and in place, reattach the protective metal heater cover plate using the four hex screws and 1/4-inch nut driver.
5. Carefully remount the heater scroll housing up into the bath fan main frame, aligning the tabs and pegs. Push firmly until it clicks into place.
6. Using a Phillips screwdriver through the vents, reinstall and tighten the two pan head screws to secure the scroll housing.
7. Reconnect the blower and heater wiring plugs using your needle nose pliers. Make sure the connectors are fully inserted.
8. Feed the 2-prong reflector assembly wiring through the center opening of the fan grille. Align the reflector base into the grille notches.
9. Screw on the decorative acorn nut using the 3/8-inch nut driver to hold the reflector cover in place.
10. Reinstall the light bulb into the socket by hand until snug.
11. Finally, hook the side retaining tabs of the clear plastic lens cover into the fan grille notches and snap into place.
12. With everything reassembled securely, restore power at the breaker panel.

More Information

Thanks for reading! We hope this article helped you replace the heater blower wheel in your NuTone or Broan bath fan.

If you still need some replacement parts, grab your model number and head over to AppliancePartsPros.com. We offer over two million parts and most orders arrive in two business days. If you need some help with finding the right part or placing an order, you can contact our team at 1 (877) 477-7278.

While you’re waiting for your new part to arrive, you can explore our DIY blog and watch thousands of video tutorials on our YouTube channel.

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