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🍋 Elevate your HVAC game—clean smarter, cool faster, and breathe fresher!
Frost King ACF19 Foam Coil Cleaner is a 19-ounce aerosol foam designed for heavy-duty cleaning of HVAC coils, fan blades, and filters. Its powerful detergent formula dissolves grease, oil, and dirt while protecting metal surfaces with corrosion inhibitors. The self-rinsing foam requires no additional water, simplifying maintenance and improving system efficiency. Enhanced with a pleasant lemon scent, it neutralizes odors and leaves your air conditioning system fresh and performing at peak levels. Ideal for DIY professionals seeking cost-effective, pro-grade HVAC upkeep.



| ASIN | B007I7KZN0 |
| Best Sellers Rank | #2,451 in Health & Household ( See Top 100 in Health & Household ) #29 in All-Purpose Household Cleaners |
| Brand | Frost King |
| Brand Name | Frost King |
| Cleaning Agent Formulation | Detergent |
| Contains Liquid Contents? | Yes |
| Customer Reviews | 4.6 out of 5 stars 17,125 Reviews |
| Item Form | Foam |
| Item Type Name | Frost King ACF19 Foam Coil Cleaner, 19Oz, 19 Ounce |
| Item Volume | 19 Fluid Ounces |
| Item Weight | 1.5 Pounds |
| Manufacturer | Thermwell Products Co., Inc |
| Manufacturer Contact Information | 1-800-526-5265 |
| Material Feature | Unscented |
| Material Features | Unscented |
| Number of Items | 1 |
| Scent | Lemon |
| Special Features | No Rinse |
| Specific Uses For Product | Window,Drain,Pans |
| Surface Recommendation | Plastic, Metal, Window |
| Unit Count | 539 Grams |
| Warranty Description | No warranty. |
A**S
Powerful HVAC Maintenance Solution That Actually Works!
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.
J**C
The Lazy Man’s AC Tune-Up in a Can
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!
S**S
Works well at removing grime
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.
D**N
Great product highly recommended!
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
T**N
Must have for spring clean up
This foam coil cleaner work great. Unless your AC unit super pack with dirt , you dont even need water. The foam dissolve all the dirt and the AC unit look brand new. Must have for annual spring clean up. Bottle size good enough for 1 unit. Also it smell pretty good too.
R**R
Great if used correctly
Great product if you use it in the right scenarios. If you have a little bit of build up on your outdoor condenser coil, this stuff is great. You literally just spray it and let it foam up and sit for a few minutes, then turn your AC back on and it sort of self-rinses as the coil condensates. It does a very, very nice job cleaning up a coil with some slight dirt, pollen, cottonwood, etc. build up. That said though, if your coil hasn't been cleaned in years and it's a complete mess, this isn't going to work as well as a good ole fashion manual cleaning with some pressurized water and solvent. So I guess what I'd say is don't expect a miracle. If your condenser is a total mess, have it cleaned professionally and/or do a more thorough manual cleaning. But if you use this like I do, once per year at the beginning of "AC Season" and the condenser coil hasn't had a chance to become filthy and you're only doing a nice little general cleanup then this stuff does a nice job and it's super easy to use. Long story short, it's not going to bring an unmaintained 20 year old unit back from the dead, but it will absolutely give you a nice little preventative maintenance style cleanup at the start of cooling season.
G**O
Quick, Easy, and It Really Works!
I used the Frost King ACF19 Foam Coil Cleaner on my air conditioner unit, and I couldn’t be happier with the results. My A/C had been running less efficiently lately airflow was weak and it just wasn’t cooling like it used to. I sprayed this cleaner on the coils, and within minutes the thick foam expanded, clung to the surfaces, and started breaking down all the built up dirt and debris. The best part? No rinsing or scrubbing needed,. however I did rinse it after the foam slowly dissolved and carried the grime away on its own. After letting it dry and turning the unit back on, I immediately noticed stronger airflow and cooler air. It honestly felt like the A/C had gotten a full tune-up. This cleaner is super easy to use, smells fresh, and one can covers a good amount of area. It also handled the job without damaging anything—perfect for regular maintenance. If your A/C hasn’t been cleaned in a while, don’t call a technician just ye, try this first. It works!
N**O
Good coil cleaner.
Good cool cleaner to use on A/C units. Does the job. Recommended.
Trustpilot
4 days ago
2 days ago