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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.

Common Questions (4)

  • It is positioned more as a foaming detergent/deodorizer than a caustic contractor-grade cleaner, and it has been used on mini splits and home units without issues. For best results, power off the unit and rinse carefully; aggressive corrosive cleaners are the ones more likely to damage thin fins.

    WooHoo2YouskerlegonpcrhBaudLord

  • It does not appear to include a tube, so it is less convenient for tight spaces like car air conditioners. A cheap introducer straw or separate tube can be used as a workaround.

    Michelle_my_belledsc888Nerd_Baller1

  • A single can can work, but a decent-sized home unit may need two cans for a thorough cleaning. The foam helps loosen grime and can improve cooling, but larger coils may need extra coverage.

    MR_FLY_GUYMR_FLY_GUYLetsDoSlick

  • It can improve coil appearance and cooling by loosening caked-on debris, and one use on an older unit reportedly cut power use by about 25%. It is also used to remove the "dirty sock" smell in older vehicle AC systems.

    MR_FLY_GUYCaleoNerd_Baller1

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

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72 Comments

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Mar 26, 2026 3:33 PM
1K Comments
Joined Jul 2014
KnowsItToBeTrueMar 26, 2026 3:33 PM
1K Comments

Our community has rated this post as helpful. If you agree, why not thank

Careful, idk about this one but some of these cleaners are corrosive and can do more damage than good.
3
1
Mar 26, 2026 3:38 PM
59 Comments
Joined Jun 2025
MagentaEducation252Mar 26, 2026 3:38 PM
59 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 one is quite reputable. I missed the other sale so this is perfect for spring prepping for the summer heat.
Mar 26, 2026 3:52 PM
8 Comments
Joined Jul 2022
CalmMoon3089Mar 26, 2026 3:52 PM
8 Comments
I've used this brand. Good stuff. This is an excellent price.
1
Mar 26, 2026 4:12 PM
31 Comments
Joined Dec 2025
GreenWalrus9117Mar 26, 2026 4:12 PM
31 Comments
Great price, i did a cleaning last year so im good for another 2 years or so. Anyone know the shelf life?
Mar 26, 2026 4:17 PM
396 Comments
Joined Nov 2006
BloodAnglMar 26, 2026 4:17 PM
396 Comments
Highly recommended. I use this twice a year on my RV ACs with excellent results. If I hadn't stocked up last deal I'd jump on this.
Mar 26, 2026 5:06 PM
26 Comments
Joined Nov 2007
jrm21086Mar 26, 2026 5:06 PM
26 Comments

Our community has rated this post as helpful. If you agree, why not thank

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.
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.
6
3
Mar 26, 2026 5:08 PM
97 Comments
Joined Feb 2020
gswansterMar 26, 2026 5:08 PM
97 Comments
Thanks! in for one

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Mar 26, 2026 5:11 PM
26 Comments
Joined Sep 2025
ScarletLeopard494Mar 26, 2026 5:11 PM
26 Comments
Thanks. I ordered 3.
Mar 26, 2026 5:16 PM
1.2K Comments
Joined Oct 2011
allen_7Mar 26, 2026 5:16 PM
1.2K Comments
$6.05 with S&S for me, thanks.
Mar 26, 2026 5:51 PM
346 Comments
Joined Aug 2005
ripper415Mar 26, 2026 5:51 PM
346 Comments

Our community has rated this post as helpful. If you agree, why not thank

Quote from jrm21086 View quoted comment :
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.
Why on earth would you use bleach on an AC unit?!
1
1
3
Mar 26, 2026 5:58 PM
26 Comments
Joined Nov 2007
jrm21086Mar 26, 2026 5:58 PM
26 Comments
Quote from ripper415 View quoted comment :
Why on earth would you use bleach on an AC unit?!
It wasn't straight bleach, it was diluted, and it was to kill mold. But its also corrosive to metal. i never had an issue before but I also was cleaning older, likely better built units that didn't seem to mind.
Mar 26, 2026 6:03 PM
2.4K Comments
Joined Nov 2011
ImYoungxDMar 26, 2026 6:03 PM
2.4K Comments
This can be used on a dehumidifier?
Pro
Mar 26, 2026 6:04 PM
11K Comments
Joined Mar 2018
WooHoo2You
Pro
Mar 26, 2026 6:04 PM
11K Comments

Our community has rated this post as helpful. If you agree, why not thank

Quote from MagentaEducation252 View quoted comment :

This one is quite reputable. I missed the other sale so this is perfect for spring prepping for the summer heat.
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.
Last edited by WooHoo2You March 27, 2026 at 08:54 AM.
5
1
Mar 26, 2026 6:04 PM
47 Comments
Joined Aug 2016
obbitarMar 26, 2026 6:04 PM
47 Comments

Our community has rated this post as helpful. If you agree, why not thank

$6.37 at Walmart.com

https://www.walmart.com/ip/Frost-...nMQAvD_BwE
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Mar 26, 2026 6:26 PM
330 Comments
Joined Mar 2009
skerlegonMar 26, 2026 6:26 PM
330 Comments
Quote from ImYoungxD View quoted comment :
This can be used on a dehumidifier?
I use it on mine. No issues.

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