How to Install Water Filter in Samsung Refrigerator: Steps

Quick answer: How to install water filter in Samsung refrigerator: turn off the water supply, twist the old cartridge counterclockwise and pull it out, remove the cap from the new one, then push it in and turn it clockwise until the lock mark lines up. Reset the filter light, turn the water back on, and dispense for about 7 minutes before drinking.

The idea never changes: twist out, cap off, twist in, flush. What does change is the cartridge shape and its hiding spot, and when I compared Samsung’s US, Canadian and UK help pages, those two details caused most of the variation.

So before buying anything, I’d read the model number printed on the old cartridge. Samsung’s US support page names that as the way to identify the right replacement.

Which Samsung Filter Do You Have?

Samsung’s Canadian guide describes the common internal types:

Filter	What it looks like	Where it usually sits
HAF-CIN	Long and round	Inside the fridge, upper right, or low near the crisper drawers
HAF-QIN	Long, with a squarish end	Same as HAF-CIN
HAFCU1	Shorter, wider cylinder	Inside the fridge, near the upper right corner
HAF-EX	External, on the water line	Outside the fridge (only a few models)

Can’t spot it? Look for a cap marked LOCK, or check the user manual.

What You’ll Need

• The correct replacement cartridge (Samsung recommends genuine Samsung filters)
• A towel for drips
• A large container or pitcher for flushing
• Your user manual, if your model isn’t covered below

How to Install Water Filter in Samsung Refrigerator (HAF-CIN or HAF-QIN)

1. Turn off the water supply, then press the dispenser until the flow stops.
2. Open the filter cover.
3. Turn the old filter counterclockwise, usually 90 or 180 degrees, to unlock it.
4. Pull it straight out. When you do, keep the towel underneath; a little spill is normal.
5. Take the protective cap off the new filter.
6. Push it in and turn it clockwise until it locks.
7. Check that the LOCK symbol lines up with the indicator line on the housing.
8. Reset the filter indicator.
9. Turn the water back on and dispense for about 7 minutes, roughly 10 to 12 large glasses. Pour that water out.

Installing a Samsung HAFCU1 Filter

1. Turn off the water and dispense until it stops.
2. Twist the old filter counterclockwise to unlock it.
3. Pull it straight down.
4. Remove the protective cap, push the new cartridge up, and turn it clockwise until it locks.
5. Confirm the notch at the top lines up with the arrow on the housing.
6. Reset the filter light, turn the water on, and flush for about 7 minutes.

The US page puts the flush for this type at “several gallons,” so don’t stop early if what comes out still looks cloudy or spits.

Resetting the Filter Light

On most models you hold the Filter Reset button, or the key with “Filter Reset (3 sec)” under it, for 3 seconds. Family Hub models do it through the screen menus. Every variation is in our guide on how to reset water filter on Samsung fridge.

If the Filter Won’t Go In or Lock

This is where I’d slow down. Muscle won’t help here, and forcing plastic threads is how housings crack.

• Is the protective cap still on? It’s the first thing the Canadian guide checks. A capped cartridge simply won’t lock.
• Is it lined up? Pull it out, realign, and push straight in before turning.
• Is the old one stuck? The UK page says impurities can make it stick, and to grip firmly and pull hard.
• Is pressure fighting you? Shut off the supply valve, the UK page advises, when pressure is too great during locking.

Mistakes to Avoid

• Skipping the flush. Air gets into the line during a swap, so a fresh cartridge may spray or sputter at first. Keep dispensing until the stream settles.
• Stopping at “good enough” on the twist. Dripping around the housing? Reinstall and turn it fully clockwise. A leak that persists may mean a damaged O-ring, and Samsung’s fix is a new genuine cartridge.
• Ignoring an odd taste. Run another 2 to 3 gallons if it tastes or smells strange, per the Canadian guide.
• Trusting only the light. It’s a six-month timer. Slower flow is your cue to replace sooner, light or not.

Don’t bother rinsing the old cartridge to reuse it. My take, backed by the EPA’s guidance on filters, is in how to clean water filter in fridge. More guides live in our water filters and softeners section.

When to Call Samsung

If water keeps leaking from the housing with a genuine cartridge fully locked in, or the dispenser won’t run at all after the swap, stop there and contact Samsung support or a technician. In practice, a cracked housing or a supply-line fault isn’t something another cartridge will fix, and I wouldn’t keep the water on while you wait.

Frequently Asked Questions

Do I need to turn off the water to change a Samsung fridge filter?

Samsung’s steps start with shutting off the water supply. It makes the change cleaner and helps if water pressure is making the filter hard to lock.

How long should I run water after installing a Samsung filter?

Samsung’s Canadian guide says about 7 minutes, or 10 to 12 large glasses, then discard it. Samsung UK says 10 liters or 6 to 7 minutes.

Why is my new Samsung water filter leaking?

Usually it isn’t fully turned. Reinstall it and turn it all the way clockwise. If it still leaks, Samsung says the O-ring may be damaged; use a new genuine filter.

Why won’t my Samsung water filter lock in?

The most common cause is the protective cap left on the new filter. Otherwise, pull it out, realign it with the housing, and push straight in before turning.

Last updated: November 10, 2026. Sources: Samsung Canada: replace the water filter in your Samsung refrigerator, Samsung US: how to replace the water filter and Samsung UK: changing your fridge water filter.