Frost King ACF19 Foam Coil Cleaner, 1.18 Pound (Pack of 1), 19 Ounce

Good product, follow directions and works as it it's described. Spray it on and use cap as fin scrubbing tool for coil. Easy to use. Rinse wire garden hose.

Frost King ACF19 Foam Coil Cleaner has been absolutely essential for maintaining our air conditioning system efficiency and has restored cooling performance that was noticeably declining due to dirty coils! As a homeowner who prefers DIY maintenance when possible but needs products that deliver professional-level results, this foam cleaner provides exactly the cleaning power needed to keep HVAC systems running optimally. The foam application system is incredibly effective at penetrating and lifting the stubborn dirt, debris, and buildup that accumulates on evaporator and condenser coils over time. Unlike liquid cleaners that run off quickly, this foam clings to surfaces long enough to break down contaminants thoroughly, ensuring complete cleaning rather than surface-level results. What impressed me most is the dramatic improvement in cooling efficiency after using this cleaner on coils that had become visibly dirty despite regular filter changes. The air conditioning system now cools faster, runs shorter cycles, and maintains consistent temperatures throughout the house, proving that proper coil maintenance directly impacts system performance. The 19-ounce size provides excellent coverage for complete residential HVAC system cleaning with enough product remaining for future maintenance cycles. The quantity is perfectly proportioned for homeowner use - sufficient for thorough cleaning without waste while being cost-effective compared to professional service calls. The ease of application makes this accessible for DIY maintenance without requiring professional equipment or extensive technical knowledge. The foam sprays evenly and consistently, making it simple to achieve complete coil coverage without missing areas that could compromise cleaning effectiveness. The cleaning action is powerful yet safe for coil materials, effectively removing buildup without causing corrosion or damage to delicate aluminum fins or copper tubing. The formulation appears specifically designed for HVAC applications rather than being a generic degreaser that might harm sensitive components. The rinse characteristics work perfectly with standard garden hose pressure, washing away completely without leaving residue that could attract new dirt or interfere with heat transfer efficiency. The clean rinse eliminates concerns about cleaner buildup affecting system performance or air quality. The odor control benefits have been noticeable in eliminating musty or stale smells that can develop when dirty coils harbor bacteria or mold growth. The fresh, clean scent after treatment indicates thorough cleaning that addresses both performance and air quality concerns. The preventive maintenance value is substantial for extending HVAC system life and maintaining energy efficiency that reduces utility costs. Regular coil cleaning with this product helps prevent expensive system repairs and maintains peak performance that justifies the minimal investment in maintenance supplies. The professional results at DIY pricing make this an outstanding value compared to service calls or professional cleaning costs. The effectiveness rivals what HVAC technicians achieve while being accessible for regular homeowner maintenance schedules. For homeowners committed to proper HVAC maintenance who want professional-quality cleaning results without service call expenses, this foam coil cleaner delivers exactly the cleaning power and ease of use needed to maintain system efficiency and extend equipment life through proper preventive care.

Got this product to clean the return air vent in my hallway that I hadn’t cleaned in the 25 years I have lived here. It had a build up of dust and grime. The foaming spray has a clean, pleasant smell and was mostly effective at loosening the dirt on the vent. I did need to scrub with a stiff bristle brush to remove the stubborn stains. Used a spray bottle with clean water to rinse the cleaner off after laying a towel down to catch drips. I would recommend this product.

May it rest in peace, it's task performed. I'll be cleaning the inner A coil this evening. The notes on the can hit all the high points for a successful operation. Price is everything right now. The great "deservening" shames most businesses, not here. 17ozs is the standard & the price is correct. The foam was thick and plentiful. So much so I had enough to hit the outside coils too. This is a "no rinse formula but a gentle rinse inside also ensures the drains work. NOTE: a very nice feature here is frost king sealed each can in cellophane. This kept the cap on while in transit. This product did a great job.

Delivered as promised performance. Sprayed inside and outside of the coils, and used garden hose pressure to flush out the yuck before this year's summer season. Removed a lot of dirt, dead bugs and leaf/needle bits with ease. Up in the NW, I don't see this as an annual job but it worked fine and the coils are clean and undamaged.

I used it as soon as it arrived on my two acs. I have a Midea smart AC and a regular old GE ac. The Midea ac had an intense stale/mildew smell coming from the air after I turned it on for first use this season. I cleaned the air filter which wasn't in bad shape and the smell persisted. Then I decided to buy this and use it. I used it on the front interior coils (2x), the air vent and the back outside coils. Turned the fan on after the foam reduced to run a little bit and the smell was greatly reduced. Then after ten minutes I switched it to ac mode and the air that came out was clean, crisp, and so fresh smelling!! It may sound weird but I stood in front of the ac just to breathe fresh air lol. Then I decided to use it on my smaller GE ac, same spots and even the entire front panel. This one didn't have a smell but there was so much dust dirt and grime that was cleaned off I was honestly surprised. Great product, immediate Results, and fixed my issue!

This product worked very well on my outdoor condenser coil, which was heavily impacted—over 5 gallons of leaves and debris had accumulated inside the unit, and the coil vanes were extremely dirty. Bottom Line For a heavily clogged outdoor coil, Frost King ACF19 performed very effectively. Combined with a thorough mechanical cleanout, it helped restore strong cooling performance without needing professional service. Unit & Conditions: Ruud 5-ton air conditioner (approx. 24 years old) Severe debris buildup inside cabinet Restricted airflow and dirty coil surfaces DIY Cleaning Process: Turned off system at thermostat/controller. Pulled outdoor disconnect to fully cut power. Removed top grille/fan assembly (several screws). Carefully lifted and supported fan assembly to avoid stressing wiring. Confirmed fan spun freely (bearings in good condition). Cleaned fan blades and removed loose debris. Used dustpan and vacuum to remove ~5 gallons of leaves and debris from inside cabinet. Checked and cleared drain holes in base pan. Applied 2 cans of Frost King ACF19 Foam Coil Cleaner directly to coil vanes. Let foam sit for ~20 minutes. Used the attached brush cap to gently dislodge stubborn debris inside fins. Rinsed thoroughly using a hose with car wash nozzle on shower setting (enough pressure to clean, not bend fins). Wiped down inside bottom pan and adjacent top shelf and reassembled unit. Allowed unit to sit for 1 hour before restarting. Results: Noticeably improved airflow and cooling performance ~5°F lower supply air temperature at vents 21°F temperature split (return vs. supply), within excellent range for residential AC Unit performance restored significantly for a 24-year-old system

Good cleaner for a/c coils. Even works on exterior coils that have been baked in 125°+ Arizona heat. Excellent amount of coverage, actually more than some of the other foaming cleaners. This means better value for the money. And it will even clean tobacco smoke residue from the interior coils. That's better than expected with 99% of the cleaning products out there.

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Sprayed this expanding foam on the UTV Rad and my ATV rad. Sprayed 2 times and pushed the foam deeper into the rad fins using air compressor air spray nozzle. All worked great. And I was amazed how much "hidden dirt" hides within the rad's small fin gaps. I plan to use this product 2 times per year. More usage when doing deep mud runs. smiles. I recommend to others....

It smells good and is super easy to use but doesn't really clean the coil much. Do not waste your money on this product people. Get your coils pressure washed instead.

Home A/C unit -Turned on the A/C unit and took digital temperature readings at several register vents, average temp was 17c to 18.5c on the longer duct runs. Took the top fan cover off the outdoor Condenser Unit and sprayed full can of Frost King on inside and outside of coil, washed coil off with gentle spray of water from garden hose (Youtube it). Took the inspection cover off the Furnace and sprayed full can of Frost King on sides of Evaporator Coil in two applications, no rinse with water necessary. End result - temperature readings at same vent registers averaged 13.5c to 14.7c. Does Frost King Foam Coil Cleaner work? You Bet. Total savings - $250 to $350 in my area for same service. Caution !! please fully understand you need to disconnect and verify no power to your A/C unit/Furnace before cleaning your system.... When in doubt Stop and think it out. Youtube has excellent tutorials.