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Home & GardenThe Home You OwnSmall space livingPlants and outdoor
livingRenovations and maintenanceDecoratingCleaning and organizing
Home & GardenThe Home You OwnSmall space livingPlants and outdoor
livingRenovations and maintenanceDecoratingCleaning and organizing



YOUR BATHROOM EXHAUST FAN IS FILLED WITH DIRT. HERE’S HOW TO CLEAN IT.

When a fan starts to sound loud and no longer keeps windows and mirrors from
fogging up, it’s time for a deep cleaning.

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hyo-howto1129 Cleaning a bathroom exhaust fan (Washington Post illustration;
reader photo)
By Jeanne Huber
November 29, 2024 at 8:05 a.m. EST

Q: I installed a Panasonic FV-11VHL2 WhisperWarm exhaust fan in one of our
bathrooms. The maintenance instructions cavalierly say: “Remove dust and dirt
from the fan body using a vacuum cleaner.” No way! Not only can’t you get to the
fan, no vacuum will ever dislodge the encrusted dirt. It has to be scraped off.
I’ve tried using wooden dowels (too thick to reach corners); old toothbrushes
(too large to fit between blades and bristles too soft); Q-tips (one or two
passes and they fray or the stem bends or breaks); a letter opener (the most
useful, but it risks scratching the plastic blades) and a damp cloth (good for
only a pass or two before it frays). It’s all tedious, one-blade-at-a-time
cleaning with repeated passes for each of the 67-plus blades. Is there an easier
way?


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ASK JEANNE ANYTHING ABOUT HOME MAINTENANCE

Jeanne Huber can help solve your problems about home repairs, gardening issues
and anything that affects your house, condo or apartment. Jeanne is a trained
carpenter and a co-founder of BARN, a craft and DIY center in Washington. She
has written the How To column since 2005. Ask Jeanne anything at
localliving@washpost.com.

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A: Manufacturers who say to clean bathroom exhaust fans with just a vacuum
aren’t being straight with their customers. While it’s true that frequent
vacuuming keeps fans cleaner, often that’s not enough. High humidity combines
with dust to create a caked-on grime that has to be washed or scraped away.

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It’s important to do this task regularly; a heavy buildup reduces a fan’s
efficiency. When a fan starts to sound loud and no longer keeps windows and
mirrors from fogging up, it’s time for a deep cleaning. And to do that, you need
unencumbered access to the fan blades. Ideally, you want a way to remove the
blades — which are often referred to as a squirrel cage — so you can put this
part in a sink or bucket filled with warm, soapy water.

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To do a deep clean, start by switching off power at the circuit. Then gather
your tools. Position a ladder or step stool under the fan, and have a headlamp
or work light handy. You’ll also need a screwdriver and a socket wrench.

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Remove the grille, which typically involves working your fingers in around
opposite edges and pulling down, then pinching each pair of spring wires above
to release the catches that hold them to the metal box.

If the grille includes an LED light unit, unplug it and remove any screws so you
can clean the grille itself in a sink filled with warm water and a little hand
dishwashing detergent. To unplug the light, you might need to press in a tab,
then pull. If the grille has a light unit that isn’t removable, clean the grille
with a brush and a vacuum or compressed air; don’t soak electronics in water.

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The WhisperWarm model you have doesn’t have an LED light built into the grille,
but it does have a fluorescent light unit between the grille and the fan, as
well as a heater with its own fan that blows hot air down while the exhaust fan
moves humid air up and out. To clean the exhaust fan, you need to remove the
light unit first. But you’d never know that from the official maintenance
instructions. Illustrations show how to remove the grille and wash it in a sink.
Then the text says to “remove dust and dirt from the fan body using a vacuum
cleaner” and to use a cloth dampened with kitchen detergent to “remove any dirt
from the fan body.” But the illustrations show a vacuum wand and a gloved hand
with a cloth wiping the fluorescent tubes of the light module — not the fan. The
instructions don’t say how to remove the light unit or even hint that it’s
necessary.

To learn how to do that, and to remove the fan so you can easily clean the
squirrel cage in water, look up the installation instructions for your fan and
scrutinize an exploded view of the parts, especially the screws that hold each
layer in place. (If you don’t know the model, remove the grille and look for a
label inside.) If you find it difficult to decipher parts drawings, or if you
can’t find them online, call the company’s technical advice number, ask to have
a PDF emailed to you, then ask the technical adviser to walk you through the
process. For Panasonic, the number is 866-292-7299. Louis — he wasn’t allowed to
give his last name — gave step-by-step instructions for your fan model and
identified the relevant pieces by the part numbers on the diagram.

To remove the light unit, take out two screws and unplug the unit from the
housing, which might involve pressing on a tab to release the plug. Then remove
the three or four screws (Louis said there are only three even though the
diagram says four) that hold the fan unit to the metal box. The box itself and
the heater assembly stay attached to the ceiling. Pull down the fan unit and
unscrew the metal on the fan housing, which is plastic. Using a socket wrench,
remove the central nut that holds the squirrel cage in place. Then you can clean
it with warm, soapy water and a toothbrush or other narrow scrub brush. Rinse
and dry and put everything back in reverse order.

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As with many home repairs, watching a YouTube video can be very helpful. There
doesn’t appear to be one for the model you have, but there is one for basic
WhisperWarm fans minus the fluorescent unit and the heater. The process of
removing the fan assembly is basically the same for many exhaust fans, although
the screw placements may differ.

Have a problem in your home? Send questions to localliving@washpost.com. Put
“How To” in the subject line, tell us where you live and try to include a photo.

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