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phoinix 55.5K Views
Mar 26, 2026 3:22 PM

19-Oz Frost King ACF19 Air Conditioner Coil Foaming Cleaner

$6.40

$16

60% off
Walmart
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Deal Details
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:
  • 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
Product Info
Community Notes
About the Poster
Deal Details
Product Info
Community Notes
About the Poster
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:
  • 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

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Top Comments

jrm21086
26Comments
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
11KComments
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
1KReputation
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 AC coil cleaner is valued for loosening caked-on dirt, improving coil appearance, and helping units cool and run more efficiently. It is also used on mini splits, RV ACs, vehicle heater cores, and older units, with reports of easy application and a fresh lemon scent. The main cautions are that some coil cleaners can be corrosive, this can still need a rinse for stubborn buildup, and larger units may take two cans. It is a practical cleaner for hard-to-reach coils when used carefully.

  • Homeowners prepping a neglected AC for summer, because the foam loosens caked-on debris and can improve cooling and lower power use.

    MagentaEducation252CaleoMR_FLY_GUY

  • People wanting a safer alternative to harsh bleach-based cleaners, because it cleans without bleach and avoids the corrosion risk of caustic products.

    jrm21086WooHoo2Youjrm21086

  • RV and mini-split owners cleaning coils regularly, because it has worked well on those units and can be used twice a year or monthly in summer.

    BloodAnglpcrh

  • DIYers cleaning hard-to-reach evaporator or heater-core coils, because the foam reaches tight spaces and removes stubborn buildup.

    WildflowerGurusakaria

  • Users of older or delicate metal coils, because corrosive cleaners can damage fins and other thin metal parts.

    KnowsItToBeTruejrm21086jrm21086

  • Car owners needing a built-in applicator tube, because this cleaner does not include one for reaching tight automotive vents.

    Michelle_my_belledsc888

  • Owners of large home units expecting one can to do a full cleaning, because a decent-sized system may need two cans for thorough coverage.

    MR_FLY_GUYMR_FLY_GUY

  • People who want a no-rinse cleanup, because the foam still needs a hose rinse to dislodge caked-on debris properly.

    CaleoBig Rad

Common Questions (4)

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

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72 Comments

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Mar 28, 2026 1:54 PM
884 Comments
Joined Apr 2006
davesgirlMar 28, 2026 1:54 PM
884 Comments
Thanks! The Spring to do list gets longer.
Mar 28, 2026 5:15 PM
9 Comments
Joined Sep 2017
JerryC2800Mar 28, 2026 5:15 PM
9 Comments
out of stock
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
1
Mar 28, 2026 11:45 PM
576 Comments
Joined Nov 2018
porksmugglersMar 28, 2026 11:45 PM
576 Comments
Quote from Luigis3rdcousin View quoted comment :
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 05:49 PM.
Mar 30, 2026 2:16 PM
61 Comments
Joined Apr 2021
SensibleString1707Mar 30, 2026 2:16 PM
61 Comments
Do these have good shelf life and is it a good idea to stock up on?
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.
Mar 31, 2026 5:04 PM
701 Comments
Joined Mar 2010
ConsumerAdvoCatMar 31, 2026 5:04 PM
701 Comments
Can it restore refrigerator coils to like-new? Where will all of the grimey dust go?

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Mar 31, 2026 5:28 PM
280 Comments
Joined Jul 2018
milkmee6Mar 31, 2026 5:28 PM
280 Comments
Same price on Amazon
Deal Editor
Apr 1, 2026 8:41 PM
24.2K Comments
Joined Aug 2014
qwikwit
Deal Editor
Apr 1, 2026 8:41 PM
24.2K Comments
This deal is still available.
Apr 1, 2026 8:46 PM
6.1K Comments
Joined Mar 2006
Core2QuadApr 1, 2026 8:46 PM
6.1K Comments
Quote from WildflowerGuru View quoted comment :
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?
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 View quoted comment :
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.
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 View quoted comment :
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
Apr 1, 2026 11:52 PM
491 Comments
Joined Jul 2008
PauseAndConnectApr 1, 2026 11:52 PM
491 Comments
Thanks OP
Apr 2, 2026 12:36 AM
745 Comments
Joined Jun 2013
Nerd_Baller1Apr 2, 2026 12:36 AM
745 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

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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.

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