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.

I purchased this after paying an air-conditioning company $100 to clean my AC unit. In my opinion I was able to do a professional quality job with this product. It is a great value. It’s easy to use and the foam fills the fins effectively and does a great job of pushing their debris out. Also, this product is rinse free! Which was nice because I didn’t have to drag a hose onto the roof and spray it into my air conditioning unit. I am not an AC technician this product was extremely easy to use for your average. I highly recommend this product. I plan on using it on my unit every spring. The effectiveness of my unit doubled after the cleaning!! I have included a before and after photo

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.

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.

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.

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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....

Excellent product with amazing results

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.

It did not clean !!