Slickdeals is community-supported. We may get paid by brands for deals, including promoted items.

Missed This Deal? Get alerts when similar deals are posted.

expired

phoinix | Staff 54.8K Views

Mar 26, 2026 3:22 PM

19-Oz Frost King ACF19 Air Conditioner Coil Foaming Cleaner

$6.40

$16

60% off

Walmart

Visit Walmart

Update: This popular deal is still available.

Walmart has 19-Oz Frost King Air Conditioner Coil Foaming Cleaner (ACF19) on sale for $6.37. Shipping is free w/ Walmart+ (free 30-day trial) or on orders of $35+.

Thanks to Deal Hunter phonix for sharing this deal.

Note: Availability for purchase may vary by location.

About this product:

Heavy-duty foam dissolves stains, removes grease & oil, and loosens dirt
Cleans coils, fan blades, and reusable air filters
Neutralizes odors from standing water in drain pans
Air conditioner coil foaming heavy duty detergent cleaner with low VOC formula
Pleasant lemon fragrance leaves deodorized, fresh smell after cleaning
No rinse necessary

Editor's Notes

Written by Nate650 | Staff

About this Store:
- Don't have Amazon Prime? Students can get a free 6-Month Amazon Prime trial with free 2-day shipping, unlimited video streaming & more.
- If you're not a student, there's also a free 1-Month Amazon Prime trial available.
Additional Information:
- Rated 4.6 out of 5 stars on Amazon based on over 17k customer reviews.
- Our research indicates that this deal is $3.62 less (36% savings) than the next best available price from a reputable merchant with prices starting from $9.99 at the time of this post.
- Please see the original post for additional details and/or view the Wiki and forum comments for further helpful discussion if available.
No longer available:
- Amazon has 19-Oz Frost King Air Conditioner Coil Foaming Cleaner (ACF19) on sale for $6.37. Shipping is free w/ Prime or on $35+ orders.

Original Post

Written by phoinix | Staff

Note: Availability for purchase may vary by location.

About this product:

Heavy-duty foam dissolves stains, removes grease & oil, and loosens dirt
Cleans coils, fan blades, and reusable air filters
Neutralizes odors from standing water in drain pans
Air conditioner coil foaming heavy duty detergent cleaner with low VOC formula
Pleasant lemon fragrance leaves deodorized, fresh smell after cleaning
No rinse necessary

Editor's Notes

Written by Nate650 | Staff

About this Store:
- Don't have Amazon Prime? Students can get a free 6-Month Amazon Prime trial with free 2-day shipping, unlimited video streaming & more.
- If you're not a student, there's also a free 1-Month Amazon Prime trial available.
Additional Information:
- Rated 4.6 out of 5 stars on Amazon based on over 17k customer reviews.
- Our research indicates that this deal is $3.62 less (36% savings) than the next best available price from a reputable merchant with prices starting from $9.99 at the time of this post.
- Please see the original post for additional details and/or view the Wiki and forum comments for further helpful discussion if available.
No longer available:
- Amazon has 19-Oz Frost King Air Conditioner Coil Foaming Cleaner (ACF19) on sale for $6.37. Shipping is free w/ Prime or on $35+ orders.

Original Post

Written by phoinix | Staff

Price Intelligence

Deal History

Sale Price

Slickdeal

$NaN

Today

Post Date	Sold By	Sale Price	Activity
09/21/26	Amazon	$6.37	0
09/15/26	Amazon	$6.35 Frontpage	15
09/10/26	Amazon	$6.35 Frontpage	37
08/29/26	Walmart	$6.35 Frontpage	31
06/27/26	Walmart	$6.35 Frontpage	29
06/11/26	Amazon	$6.35 Frontpage	7
06/02/26	Amazon	$6.37	3
05/23/26	Walmart	$6.35 Frontpage	18
04/23/26	Amazon	$6.37	8
04/22/26	Walmart	$6.40 Frontpage	22
03/24/26	Amazon	$6.37 Popular	6
08/18/25	Walmart	$4.55 Frontpage	50

Top Comments

jrm21086

25Comments

18Reputation

So not doubting this to be true, but I had inherited a 2/3 year old Hisense unit from my home's previous owners. Was in great shape. I'm obsessed with moldy ACs and always clean them really well. I did my usual trick of degreaser to clean and bleach water to sanitize. Not only did the bleach start to corrode some of the fins but I think I got degreaser in the motor bearings and the fan ran like s***. Had to throw it away. On my new units I used this spray. Not only is it easy to use, it's lemony fresh and did a much better job at cleaning. It also kills organisms without using bleach which is very harmful to the cheap thin metal that all AC units use for the fins.

Go to Comment

WooHoo2You

10.7KComments

2KReputation

It isn't so much being "reputable" but use case. Most of the corrosive coil cleaners are contractor grade, meant to be used exclusively on certain types of condensing units / condensing coils / cooling towers (never on evaporator coils), require dilution, and heavy rising. They can be very hazardous in the hands of those who claim to 'know enough to be dangerous' (and generally are...but not in a good way).

This on the other hand is more of a foaming detergent / deodorizer vs a rather caustic 'cleaner' you likely find at an HVAC wholesaler.

Go to Comment

WildflowerGuru

3.9KComments

997Reputation

I use this with a plastic tube attached to reach vehicle heater cores. Clean the living F out of them. Heater cores get loaded with hard to remove accumilated substances. Makes a huge difference.

Go to Comment

Community Reviews

This foaming coil cleaner is valued as an easy way to clear caked on grime from AC coils, mini splits, RV units, and even heater cores, with reports that it improves appearance, cooling, and sometimes lowers power use. The formula is described as lemony fresh and less harsh than bleach based cleaning, while still loosening debris that a hose alone may miss. The main cautions are that it may take two cans for a larger unit, and the bottle does not appear to include a tube for tight spaces. A practical pick for routine coil maintenance when access and coverage matter.

spring prepping homeowners who want to clean their AC coils before summer heat because commenters said it's "perfect for spring prepping for the summer heat" and they used it for that timing with good results.
MagentaEducation252
RV owners cleaning their air conditioner coils twice a year because one commenter said they use it twice a year on their RV ACs with excellent results.
BloodAngl
people with mini splits who want a foaming coil cleaner for regular maintenance because a commenter said they use it on their mini splits and even suggested adding one of the tabs monthly during summer.
pcrh
homeowners trying to avoid bleach-based corrosion on thin AC fins because commenters reported bleach/degreaser corroding fins and damaging motor bearings/fans, while this spray was easier to use and "kills organisms without using bleach."
jrm21086
owners who need a foaming detergent/deodorizer approach (not a caustic HVAC-wholesale cleaner) because commenters warned many corrosive coil cleaners are contractor-grade and hazardous if misused, while this one is described as more of a foaming detergent/deodorizer.
WooHoo2You
drivers cleaning vehicle heater cores with a reach tube because one commenter said they attach a plastic tube and it "clean[s] the living F out of them," making a huge difference on hard-to-remove buildup.
WildflowerGuru
people with dusty outdoor units who want to keep performance up during nonstop summer use because a commenter said they run their units nonstop and want to keep coils clean to boost performance and avoid overworking, especially with dust exposure near a gravel pit.
BloodAngl
homeowners cleaning evaporator coils where the intake side cakes up because commenters said the intake side is what cakes up even when the visible side looks clean, so a foaming coil cleaner can help you address that hidden buildup.
porksmugglers

car owners trying to clean a car air conditioner because commenters said it doesn't come with a tube for hard-to-reach areas, making it unsuitable for their cars air conditioner.
Michelle_my_belle
people expecting a "no rinse necessary" product because one commenter disagreed with the manufacturer's claim and said you should rinse/blast coils with a hose nozzle to dislodge more caked-on debris.
Caleo
buyers who need a one-can solution for a larger home or decent-sized unit because commenters said you may need two cans for thorough cleaning.
MR_FLY_GUY
people who want to use it as a straight, highly caustic cleaner without dilution because commenters warned it can be corrosive to metal and that many corrosive coil cleaners require dilution and heavy rising.
jrm21086
buyers who are relying on the exact Amazon deal price because commenters said the deal was dead on Amazon (with a higher price like $11.35), so the value may not match what you expect.
UniqueMorning5442

Common Questions (5)

It is positioned more as a foaming detergent/deodorizer than a caustic contractor-grade coil cleaner, and it is used on evaporator coils and mini splits. For best results, power off the unit and rinse carefully from inside to outside without blasting the fins.
WooHoo2You pcrh BaudLord sakaria
It does not appear to include a tube, so it is less convenient for tight spaces like car air conditioners. A cheap introducer straw can be used as a workaround if you need to reach deeper into an opening.
Michelle_my_belle dsc888 Nerd_Baller1
It has been used successfully on RV ACs and vehicle heater cores, and it can help remove stubborn buildup in those systems. It is also mentioned as useful for eliminating the "dirty sock" smell in older vehicle ACs.
BloodAngl WildflowerGuru Nerd_Baller1
A decent-sized home unit may take two cans for a thorough cleaning. One can can improve appearance and cooling, but larger coils often need a second pass to fully remove grime.
MR_FLY_GUY MR_FLY_GUY
It can loosen caked-on debris that a hose alone may not remove, and cleaning can reduce how hard the unit runs. One report described about a 25% drop in power consumption after cleaning a 2.5-year-old unit.
Caleo BloodAngl

AI-generated summary based on comments from the community. Updated 3mo ago

Join The Conversation

Share your experience with the Slickdeals community

Share information with the community. Please follow our Community Guidelines and be kind!

72 Comments

davesgirl

Mar 28, 2026 1:54 PM

882 Comments

Joined Apr 2006

davesgirlMar 28, 2026 1:54 PM

882 Comments

Thanks! The Spring to do list gets longer.

JerryC2800

Mar 28, 2026 5:15 PM

9 Comments

Joined Sep 2017

JerryC2800Mar 28, 2026 5:15 PM

9 Comments

out of stock

flames9

Mar 28, 2026 5:40 PM

307 Comments

Joined Jul 2009

flames9Mar 28, 2026 5:40 PM

307 Comments

cheaper at amazon at $6.37 a can

porksmugglers

Mar 28, 2026 11:45 PM

548 Comments

Joined Nov 2018

porksmugglersMar 28, 2026 11:45 PM

548 Comments

Quote from Luigis3rdcousin

I used this in 2024 and our AC hadn't ever gotten cleaned in 20 years and it wasn't that dirty. So I'll pause this time. I guess depends where your AC is and how dirty it gets so fast

Most homeowners, and lazy techs look at the wrong side of the evap coil, the intake is what cakes up, even with proper filtration, while the visible side always looks clean. The most common foaming brand used in industry is Nu-Calgon. I buy Purafilter 2000 by the gallon, requires dilution, safe on evap and condensers. Make sure you're checking both sides of each.

Last edited by porksmugglers March 28, 2026 at 04:49 PM.

SensibleString1707

Mar 30, 2026 2:16 PM

60 Comments

Joined Apr 2021

SensibleString1707Mar 30, 2026 2:16 PM

60 Comments

Do these have good shelf life and is it a good idea to stock up on?

Michelle_my_belle

Mar 31, 2026 1:39 PM

103 Comments

Joined Feb 2021

Michelle_my_belleMar 31, 2026 1:39 PM

103 Comments

to note, it does not come with a tube for hard to reach areas. not suitable for my cars airconditioner.

ConsumerAdvoCat

Mar 31, 2026 5:04 PM

653 Comments

Joined Mar 2010

ConsumerAdvoCatMar 31, 2026 5:04 PM

653 Comments

Can it restore refrigerator coils to like-new? Where will all of the grimey dust go?

milkmee6

Mar 31, 2026 5:28 PM

274 Comments

Joined Jul 2018

milkmee6Mar 31, 2026 5:28 PM

274 Comments

Same price on Amazon

qwikwit

Deal Editor

Apr 1, 2026 8:41 PM

23.7K Comments

Joined Aug 2014

qwikwit

Deal Editor

Apr 1, 2026 8:41 PM

23.7K Comments

This deal is still available.

Core2Quad

Apr 1, 2026 8:46 PM

6.1K Comments

Joined Mar 2006

Core2QuadApr 1, 2026 8:46 PM

6.1K Comments

Quote from WildflowerGuru

I use this with a plastic tube attached to reach vehicle heater cores. Clean the living F out of them. Heater cores get loaded with hard to remove accumilated substances. Makes a huge difference.

Can you describe your process more?

MR_FLY_GUY

Apr 1, 2026 9:01 PM

2.3K Comments

Joined Feb 2010

MR_FLY_GUYApr 1, 2026 9:01 PM

2.3K Comments

Quote from KnowsItToBeTrue

Careful, idk about this one but some of these cleaners are corrosive and can do more damage than good.

This is is great. No issues. But you will need 2 if you have a decent sized unit/house.

MR_FLY_GUY

Apr 1, 2026 9:03 PM

2.3K Comments

Joined Feb 2010

MR_FLY_GUYApr 1, 2026 9:03 PM

2.3K Comments

Quote from ConsumerAdvoCat

Can it restore refrigerator coils to like-new? Where will all of the grimey dust go?

New no. 10x better yes. The debris and grime or the like will be rinse off in to the center part and drain. This works great for cleaning appearance and cooling. I will need 2 to be thorough tho

PauseAndConnect

Apr 1, 2026 11:52 PM

490 Comments

Joined Jul 2008

PauseAndConnectApr 1, 2026 11:52 PM

490 Comments

Thanks OP

Nerd_Baller1

Apr 2, 2026 12:36 AM

744 Comments

Joined Jun 2013

Nerd_Baller1Apr 2, 2026 12:36 AM

744 Comments

Attention Tesla owners lol. This is what you use to get rid of that awful dirty sock smell after AC runs on older ish vehicles

hydrocynus

Apr 2, 2026 12:50 AM

1.1K Comments

Joined Nov 2008

hydrocynusApr 2, 2026 12:50 AM

1.1K Comments

Ordered 10. Thanks. Max is 3 With amazon.

Join The Conversation

Share your experience with the Slickdeals community

Share information with the community. Please follow our Community Guidelines and be kind!

Grocery Cleaning Supplies Household Goods Home & Home Improvement Storage & Cleaning Building & Remodeling Supplies HVAC Maintenance & Supplies

Rating:	(4.6 out of 5 stars)
Reviews:	17,069 Walmart Reviews
Manufacturer:	Thermwell Products Co., Inc
Model Number:	ACF19
Product SKU:	B007I7KZN0
ASIN:	B007I7KZN0
Brand:	Frost King
Item Dimensions LxWxH:	19 x 8.2 x 13 inches
Item Weight:	1.5 pounds
Item model number:	ACF19
Manufacturer:	Thermwell Products Co., Inc

19-Oz Frost King ACF19 Air Conditioner Coil Foaming Cleaner

$6.40

$16

Editor's Notes

Original Post

Editor's Notes

Original Post

Community Voting

Price Intelligence

Deal History

Top Comments

Community Reviews

Best For / Not Worth It If (13)

Pros & Cons (8)

Common Questions (5)

Join The Conversation

72 Comments

Join The Conversation

Related Searches

19-Oz Frost King ACF19 Air Conditioner Coil Foaming Cleaner

$6.40

$16

Editor's Notes

Original Post

Editor's Notes

Original Post

Price Intelligence

Deal History Deal History includes data from multiple reputable stores, such as Best Buy, Target, and Walmart. The lowest price among stores for a given day is selected as the "Sale Price". Sale Price does not include sale prices at Amazon unless a deal was posted by a community member.

Top Comments

Community Reviews

Best For / Not Worth It If (13)

Pros & Cons (8)

Common Questions (5)

Is Frost King ACF19 safe to use on evaporator coils and mini splits?

Does Frost King ACF19 come with a tube for hard-to-reach coils or car ACs?

Can Frost King ACF19 be used on RVs, heater cores, or vehicle AC systems?

How much Frost King ACF19 do you need for a larger home AC unit?

Will Frost King ACF19 actually improve AC performance?

Join The Conversation

72 Comments

Join The Conversation

Related Searches

Deal History