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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
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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 | Staff
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 | Staff

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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.

  • 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.

  • 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.

  • 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."

  • 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.

  • 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.

  • 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.

  • 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.

  • 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.

  • 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.

  • 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.

  • 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.

  • 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.

Common Questions (5)

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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

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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
56 Comments
Joined Jun 2025
MagentaEducation252Mar 26, 2026 3:38 PM
56 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
25 Comments
Joined Nov 2007
jrm21086Mar 26, 2026 5:06 PM
25 Comments

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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
95 Comments
Joined Feb 2020
gswansterMar 26, 2026 5:08 PM
95 Comments
Thanks! in for one

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Mar 26, 2026 5:11 PM
25 Comments
Joined Sep 2025
ScarletLeopard494Mar 26, 2026 5:11 PM
25 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
340 Comments
Joined Aug 2005
ripper415Mar 26, 2026 5:51 PM
340 Comments

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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
25 Comments
Joined Nov 2007
jrm21086Mar 26, 2026 5:58 PM
25 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?
Mar 26, 2026 6:04 PM
10.7K Comments
Joined Mar 2018
WooHoo2YouMar 26, 2026 6:04 PM
10.7K Comments

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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 07:54 AM.
5
1
Mar 26, 2026 6:04 PM
46 Comments
Joined Aug 2016
obbitarMar 26, 2026 6:04 PM
46 Comments

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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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