How do I fit the FY3401/00?

No tools, a few minutes: 5 steps, listed on this page with the replacement video where the maker has one.

What happens if I don't change it?

A scaled-up wick soaks up less water, so the room gets less moisture for the same running time.

Humidifier filter

Philips FY3401/00 Humidification Filter (PureProtect Water 3400 AC3420, AC3421)

FY3401/00

Fits 2 models · replace every 6 months

Wrong part, or your model missing? Tell us. A person checks every report.

GenuineGenuine Philips

$34.00

Amazon AU · 28 OctLowest genuine · Amazon AU · checked 28 Oct

CompatibleCompatible option

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No compatible seller tracked yetNo compatible seller tracked yet

Genuine: made by Philips. Compatible: another brand.Genuine is made by Philips. Compatible is made by another brand. Check the seller's page for the size and models it fits.

Lowest price · $34.00

Amazon AU. Every seller we track is listed below. Some links earn us a commission. Some seller links earn us a commission, at no extra cost to you.

Open Amazon AU · $34.00

Compare 1 seller

AUD, before delivery. Each price shows when it was checked.

Genuine Philips

1 seller

Amazon AUGenuine · checked 28 OctGenuine part · Lowest genuinechecked 28 Oct$34.00OpenGo to seller

Open cheapest seller · $34.00

Opens Amazon AU in a new tab. Their page is the source of truth for price, delivery and returns.

How long it lasts

Usually every 6 months (Philips says to change it at least once a year, even if it still looks good).

After replacing: No counter to reset for this filter. The filter cleaning reminder is cleared by holding the two buttons the manual shows for 3 seconds, or in the Philips Air+ app.

Not due yet?

Get a nudge when your humidifier filter is due — it's every 6 months. One email two weeks before, no newsletter. Manage or stop it anytime.

How to change the FY3401/00 humidifier filter

Watch the guide or follow the steps.

Philips Smart 2-in-1 Air Purifier and Humidifier - PureProtect Water 3400 Series · Philips Home Living (official)

1Switch the purifier off and unplug it.
2Pull the water tank out of the purifier.
3Take the bracket off the old humidification filter and throw the filter away.
4Unwrap the new FY3401 filter and fit the bracket around it.
5Put the water tank back in.

Every number this part goes byFY3401 · FY3401-00 · FY3401/00

Retail name:: FY3401
Retail name:: FY3401-00
Retail name:: FY3401/00

Sellers list any of these; they are the same part.

Will it fit your appliance?

Type your model number and we'll check it against the makers' lists.

Your appliance model

Fits these 2 Philips modelsAC3420, AC3421

Philips2 models

Common questionsWhat does the FY3401/00 fit? · How often should I replace the FY3401/00? · Where can I buy the FY3401/00 in Australia?

What does the FY3401/00 fit?: The Philips FY3401/00 Humidification Filter (PureProtect Water 3400 AC3420, AC3421) fits the Philips AC3420 and AC3421.
How often should I replace the FY3401/00?: Every 6 months. It works less well as the filter fills up, so it's worth doing on time.
Where can I buy the FY3401/00 in Australia?: We track 1 Australian seller for the FY3401/00; the lowest listed price when we last checked was A$34.00 at Amazon AU. Prices are re-checked daily and dated on this page.
How do I fit the FY3401/00?: No tools, a few minutes: 5 steps, listed on this page with the replacement video where the maker has one.
What happens if I don't change it?: A scaled-up wick soaks up less water, so the room gets less moisture for the same running time.
How do I reset the reminder?: No counter to reset for this filter. The filter cleaning reminder is cleared by holding the two buttons the manual shows for 3 seconds, or in the Philips Air+ app.

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