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

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.

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.

Cheap and does the job!

After living in our house for about a year, I was advised that it was a good idea to clean the HVAC coils as part of routine maintenance. I was pleasantly surprised by how easy this product made the process. The foam was simple to apply and did an excellent job of cleaning the coils with very little effort. Regular maintenance like this can help keep an air conditioning system operating efficiently, especially in Florida where the HVAC works hard for much of the year. The two-pack offers excellent value for the money and makes it easy to keep an extra can on hand for future maintenance. If you want a simple and effective way to clean your HVAC unit, this is an excellent product and well worth having.

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!

Frost King ACF19 is the easiest way I’ve found to clean my outdoor AC condenser coils without turning it into a full-day project. Just shut off the unit, spray it on, let it foam up like a root beer float, and watch years of Arkansas dust, cottonwood fluff, and mystery grime drip out the bottom. No rinsing, no scrubbing, and my AC runs noticeably cooler and quieter afterward. Pros: • Heavy-duty foaming action — Expands and lifts embedded dirt, pollen, and grease way better than just hosing it off • Truly no-rinse formula — Foam dissolves and drains away on its own; perfect for condenser coils • Big 19-oz can — Plenty of product for a full-size unit (usually one can does the whole coil) • Improves efficiency fast — Electric bill dropped and unit cycles less after one application • Simple DIY — No special tools or pro needed; anyone can do it in 15–20 minutes Cons: • Strong chemical smell while it works — Do it on a breezy day and keep pets/kids away until it airs out • Can sputters near the end — Shake well and use short bursts to get every last bit • Over-spray happens — Cardboard shield recommended so you don’t bleach the grass or siding If you’re in a hot, dusty area like Camden and your AC is struggling every summer, this Frost King foam cleaner is cheap insurance. One $15 can saves you a $150 service call and keeps the unit happy longer. Absolute garage essential—5 stars!

Works great and has a refreshing scent!!! So pleased with how clean the ac components were with no scrubbing or damage!!! I sprayed the cleaner on the, scooped off the dirty foam then rinsed the remaining foam through the unit with a cold water spray bottle.

When the HVAC folks quoted me between $250-$350 to clean my coils... well, I needed to figure it out for myself. So first, I had no idea cleaning HVAC coils was a thing = mine hadn't been cleaned in at least 7 years. Yeah, they were gross. A few youtubes later and I was popping mine open on a lovely sunny day. I used both cans, one inside and one out then set a timer and went back to rinse it 20 min later. Very gratifying to rinse away grey brown foam. Putting it all back together required patience and gloves - the metal edges on the surround are sharp. Sigh of relief when I turned it back on and everything worked. Fun part - we can watch our energy draw via our solar app and it seems we've netted an almost 20% increase in efficiency.

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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.