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.
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.
This collaborative space allows users to contribute additional information, tips, and insights to enhance the original deal post. Feel free to share your knowledge and help fellow shoppers make informed decisions.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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Quote
from KnowsItToBeTrue
:
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.
Our community has rated this post as helpful. If you agree, why not thank
Quote
from jrm21086
:
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.
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.
Our community has rated this post as helpful. If you agree, why not thank
Quote
from MagentaEducation252
:
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.
Top Comments
This on the other hand is more of a foaming detergent / deodorizer vs a rather caustic 'cleaner' you likely find at an HVAC wholesaler.
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.
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This one is quite reputable. I missed the other sale so this is perfect for spring prepping for the summer heat.
This on the other hand is more of a foaming detergent / deodorizer vs a rather caustic 'cleaner' you likely find at an HVAC wholesaler.
Our community has rated this post as helpful. If you agree, why not thank
https://www.walmart.com/ip/Frost-...nMQAvD_BwE
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